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Apparently not a huge reach:
'ZnO is a relatively soft material with approximate hardness of 4.5 on
the Mohs scale <https://en.wikipedia.org/wiki/Mohs_scale>.'
https://en.wikipedia.org/wiki/Zinc_oxide
Generally, you want abrasives to be fairly hard; abrasives aren't listed
as one of its many other uses.
On 9/30/2023 2:04 PM, llennep@verizon.net wrote:
> Props of elemental zinc are likely very different from the
> compound zinc oxide.
> Keith
> Chemist
>
>
> Sent from the all new AOL app for iOS
> <https://apps.apple.com/us/app/aol-news-email-weather-video/id646100661>
>
> On Saturday, September 30, 2023, 4:45 PM, Bob Spidell
> <bspidell@comcast.net> wrote:
>
> Same with any grinding compound: The components are selected for
> their shape, hence 'cutting' ability, hardness, purpose, cost,
> etc. A compound with large particles with sharp edges will cut
> deeper and faster than one with particles of a softer and/or more
> rounded shape. The kit I bought came with a paste consisting of
> rhyolite and whatever semi-liquid was used to make it a paste; it
> appears aluminum oxide is also used.
>
> A coarser compound will remove deeper scratches, but leave its own
> scratches. You can start with a coarser compound to remove larger
> scratches, then switch to a finer compound to remove smaller
> scratches, and so on; just like you might start rubbing paint--or
> filler--with 320grit sandpaper, then 400, then 600, 1200, etc.
> Some polishing compounds do that 'automatically,' they start with
> larger particles which themselves break down to smaller particles
> and successively smooth the surface. McGuiars (sp?) has several
> compounds, all graded on a thermometer-like scale for their
> cutting (deep) or polishing (fine) characteristics.
>
> I appears the lapidary (mineral-polishing) crowd has lots of
> discussion re: best compounds. Cerium oxide is mentioned a lot,
> rhyolite some, but I didn't see any mention of zinc oxide. Zinc is
> a soft metal and may not lend itself to being a good polishing
> compound, for glass anyway. Cost will (always) be an issue,
> rhyolite may be a better compound than cerium oxide but may cost
> more, or vice versa.
>
> bs
>
>
> On 9/30/2023 9:46 AM, llennep@verizon.net
> What is special about cerium oxide? Â Why not use zinc oxide?
>
> On Saturday, September 30, 2023, 04:20:50 AM EDT, Mark Donaldson
> wrote:
>
>
> Ira,
>
> I have a spare windscreen with wiper blade â??rainbowâ?? scratches on
> both sides. To remove them I have purchased some CERIUM OXIDE to
> make a paste and hand-polish them out.
>
> The people at the glass company told me the process will be slow
> (a lot of elbow grease) but applying it to a soft rotary pad will
> speed up the procedure.
>
> My cost equates to about US $15 for 4 ounces. That amount should
> do the whole windscreen.
>
> Here is a useful YouTube link: https://youtu.be/4ZJPPC1ak50
> <https://youtu.be/4ZJPPC1ak50>
>
>
>
> I hope this will help.
>
> Mark
>
> Ardmore
>
> NZ
>
> *Sent:* Saturday, 30 September 2023 5:08 AM
> *Cc:* Ahealey help <healeys@autox.team.net>
> *Subject:* Re: [Healeys] Windscreen scratches
>
> I got nothing to loose. Might as well give it a try. BTW, this is
> on my 67B. Those windscreens are spendy to replace
>
> Ira Erbs
> Milwaukie, OR
> 1959 Austin Healey 100-6
> 1967 MGB Roadster
>
> On Fri, Sep 29, 2023, 9:06 AM Bob Spidell <bspidell@comcast.net
>
> I used a kit with some sandpaper, a mild abrasive and an
> attachment for a drill to polish my BN2's windshield. IIRC, I
> got it from Eastwood:
>
> https://www.eastwood.com/glass-polishing-kit-for-deep-scratches.html
> <https://www.eastwood.com/glass-polishing-kit-for-deep-scratches.html>
>
> The 'rule-of-thumb' is if the scratch can be felt with a
> fingernail it can't be removed, but my car had mostly mild
> wiper wear and the kit did the job well enough I can live with it.
>
> Bob
>
> On 9/29/2023 3:41 AM, Robert Markovich via Healeys wrote:
>
> There are some some places that polish windshields. But
> ultimately it may be more cost-effective to simply
> replace. Triplex is the brand to use; an OEM manufacturer
> that supplied them back then. The rest often donâ??t fit
> right and eventually crack from stress points, as Iâ??ve found.
>
> Sent from the all new AOL app for iOS
>
> <https://apps.apple.com/us/app/aol-news-email-weather-video/id646100661>
>
> On Friday, September 29, 2023, 2:01 AM, i erbs
>
> Howdy all
>
> Is there any proven way to remove wiper blade
> scratches from a windscreen?
>
> Thanks all
>
> Ira Erbs
> Milwaukie, OR
> 1959 Austin Healey 100-6
> 1967 MGB Roadster
>
>
>
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Apparently not a huge reach: <br>
 <br>
'ZnO is a relatively soft material with approximate hardness of 4.5
on the <a href="https://en.wikipedia.org/wiki/Mohs_scale";
title="Mohs scale">Mohs scale</a>.'<br>
<br>
<a class="moz-txt-link-freetext"
href="https://en.wikipedia.org/wiki/Zinc_oxide";>https://en.wikipedia.org/wiki/Zinc_oxide</a><br>
<br>
Generally, you want abrasives to be fairly hard; abrasives aren't
listed as one of its many other uses.<br>
<br>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 9/30/2023 2:04 PM,
<a class="moz-txt-link-abbreviated"
href="mailto:llennep@verizon.net";>llennep@verizon.net</a> wrote:<br>
</div>
<blockquote type="cite"
cite="mid:858379718.3772223.1696107889269@mail.yahoo.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!--[if gte mso
9]><xml><o:OfficeDocumentSettings><o:AllowPNG/><o:PixelsPerInch>96</o:PixelsPerInch></o:OfficeDocumentSettings></xml><![endif]-->
Props of elemental zinc are likely very different from the
compound zinc oxide.Â
<div>Keith</div>
<div>Chemist<br>
<br>
<br>
<div class="yahoo-signature"><a
href="https://apps.apple.com/us/app/aol-news-email-weather-video/id646100661";
moz-do-not-send="true">Sent from the all new AOL app for iOS</a><br>
</div>
<br>
<p class="yahoo-quoted-begin" style="font-size: 15px; color:
#715FFA; padding-top: 15px; margin-top: 0">On Saturday,
September 30, 2023, 4:45 PM, Bob Spidell
<a class="moz-txt-link-rfc2396E"
href="mailto:bspidell@comcast.net";><bspidell@comcast.net></a> wrote:</p>
<blockquote class="iosymail">
<div id="yiv5251287396">
<div> Same with any grinding compound: The components are
selected for their shape, hence 'cutting' ability,
hardness, purpose, cost, etc. A compound with large
particles with sharp edges will cut deeper and faster than
one with particles of a softer and/or more rounded shape.
The kit I bought came with a paste consisting of rhyolite
and whatever semi-liquid was used to make it a paste; it
appears aluminum oxide is also used. <br clear="none">
<br clear="none">
A coarser compound will remove deeper scratches, but leave
its own scratches. You can start with a coarser compound
to remove larger scratches, then switch to a finer
compound to remove smaller scratches, and so on; just like
you might start rubbing paint--or filler--with 320grit
sandpaper, then 400, then 600, 1200, etc. Some polishing
compounds do that 'automatically,' they start with larger
particles which themselves break down to smaller particles
and successively smooth the surface. McGuiars (sp?) has
several compounds, all graded on a thermometer-like scale
for their cutting (deep) or polishing (fine)
characteristics.<br clear="none">
<br clear="none">
I appears the lapidary (mineral-polishing) crowd has lots
of discussion re: best compounds. Cerium oxide is
mentioned a lot, rhyolite some, but I didn't see any
mention of zinc oxide. Zinc is a soft metal and may not
lend itself to being a good polishing compound, for glass
anyway. Cost will (always) be an issue, rhyolite may be a
better compound than cerium oxide but may cost more, or
vice versa.<br clear="none">
<br clear="none">
bs<br clear="none">
<br clear="none">
<br clear="none">
<div id="yiv5251287396yqtfd83629"
class="yiv5251287396yqt1317478113">
<div class="yiv5251287396moz-cite-prefix">On 9/30/2023
9:46 AM, <a rel="nofollow noopener noreferrer"
shape="rect" ymailto="mailto:llennep@verizon.net";
target="_blank" href="mailto:llennep@verizon.net";
class="yiv5251287396moz-txt-link-abbreviated
moz-txt-link-freetext"
moz-do-not-send="true">llennep@verizon.net</a>
wrote:<br clear="none">
</div>
<blockquote type="cite"> </blockquote>
</div>
</div>
<div id="yiv5251287396yqtfd64874"
class="yiv5251287396yqt1317478113">
<div>
<div style="font-family:Arial, Helvetica,
sans-serif;font-size:16px;"
class="yiv5251287396ydpc19107b0yahoo-style-wrap">
<div dir="ltr">What is special about cerium oxide?
 Why not use zinc oxide?</div>
<div><br clear="none">
</div>
</div>
<div
id="yiv5251287396ydp975197d1yahoo_quoted_6475527098"
class="yiv5251287396ydp975197d1yahoo_quoted">
<div style="font-family:'Helvetica Neue', Helvetica,
Arial, sans-serif;font-size:13px;color:#26282a;">
<div> On Saturday, September 30, 2023, 04:20:50 AM
EDT, Mark Donaldson <a rel="nofollow noopener
noreferrer" shape="rect"
ymailto="mailto:ardmorebusiness@xtra.co.nz";
target="_blank"
href="mailto:ardmorebusiness@xtra.co.nz";
class="yiv5251287396moz-txt-link-rfc2396E"
moz-do-not-send="true"><ardmorebusiness@xtra.co.nz></a>
wrote: </div>
<div><br clear="none">
</div>
<div><br clear="none">
</div>
<div>
<div id="yiv5251287396ydp975197d1yiv6310450809">
<div>
<div
class="yiv5251287396ydp975197d1yiv6310450809WordSection1">
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">Ira,</span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;"> Â </span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">I have a spare windscreen
with wiper blade â??rainbowâ?? scratches on
both sides. To remove them I have
purchased some CERIUM OXIDE to make a
paste and hand-polish them out. </span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">The people at the glass
company told me the process will be slow
(a lot of elbow grease) but applying it
to a soft rotary pad will speed up the
procedure.</span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">My cost equates to about
US $15 for 4 ounces. That amount should
do the whole windscreen.</span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;"> Â </span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">Here is a useful YouTube
link:Â Â </span><span
style="font-family:sans-serif;"><a
rel="nofollow noopener noreferrer"
shape="rect" target="_blank"
href="https://youtu.be/4ZJPPC1ak50";
moz-do-not-send="true"><span
style="color:#0563C1;">https://youtu.be/4ZJPPC1ak50</span></a></span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;"> Â </span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;"><br clear="none">
</span><span
style="font-family:sans-serif;"></span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;"> Â </span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;"> Â </span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><br
clear="none">
<span
style="font-family:sans-serif;color:#1F497D;">Â Â Â Â Â Â Â Â Â Â </span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;"> Â </span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;"> Â </span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">
              </span><span
style="font-family:sans-serif;color:#1F497D;"></span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#003399;"> Â </span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#003399;">I hope this will help.</span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#003399;"> Â </span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#003399;">Mark</span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#003399;">Ardmore</span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#003399;">NZ</span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;"> Â </span></p>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;"> Â </span></p>
<div
id="yiv5251287396ydp975197d1yiv6310450809yqt18608"
class="yiv5251287396ydp975197d1yiv6310450809yqt2016400307">
<div style="border:none;border-top:solid
#E1E1E1 1.0pt;padding:3.0pt 0cm 0cm
0cm;">
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><b><span
lang="EN-US">From:</span></b><span
lang="EN-US"> i erbs <a
rel="nofollow noopener noreferrer"
shape="rect"
ymailto="mailto:eyera3000@gmail.com";
target="_blank"
href="mailto:eyera3000@gmail.com";
class="yiv5251287396moz-txt-link-rfc2396E"
moz-do-not-send="true"><eyera3000@gmail.com></a>
<br clear="none">
<b>Sent:</b> Saturday, 30 September
2023 5:08 AM<br clear="none">
<b>To:</b> Bob Spidell <a
rel="nofollow noopener noreferrer"
shape="rect"
ymailto="mailto:bspidell@comcast.net";
target="_blank"
href="mailto:bspidell@comcast.net";
class="yiv5251287396moz-txt-link-rfc2396E"
moz-do-not-send="true"><bspidell@comcast.net></a><br
clear="none">
<b>Cc:</b> Ahealey help <a
rel="nofollow noopener noreferrer"
shape="rect"
ymailto="mailto:healeys@autox.team.net";
target="_blank"
href="mailto:healeys@autox.team.net";
class="yiv5251287396moz-txt-link-rfc2396E"
moz-do-not-send="true"><healeys@autox.team.net></a><br
clear="none">
<b>Subject:</b> Re: [Healeys]
Windscreen scratches</span></p>
</div>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal">
 </p>
<div>
<p style="margin-bottom:12.0pt;"
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal">I
got nothing to loose. Might as well
give it a try. BTW, this is on my 67B.
Those windscreens are spendy to
replace </p>
<div>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal">Ira
Erbs<br clear="none">
Milwaukie, OR<br clear="none">
1959 Austin Healey 100-6<br
clear="none">
1967 MGB Roadster</p>
</div>
</div>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal">
 </p>
<div>
<div>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal">On
Fri, Sep 29, 2023, 9:06 AM Bob
Spidell <<a rel="nofollow
noopener noreferrer" shape="rect"
ymailto="mailto:bspidell@comcast.net"; target="_blank"
href="mailto:bspidell@comcast.net";
class="yiv5251287396moz-txt-link-freetext moz-txt-link-freetext"
moz-do-not-send="true">bspidell@comcast.net</a>>
wrote:</p>
</div>
<blockquote
style="border:none;border-left:solid
#CCCCCC 1.0pt;padding:0cm 0cm 0cm
6.0pt;margin-left:4.8pt;margin-right:0cm;">
<div>
<p style="margin-bottom:12.0pt;"
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal">I
used a kit with some sandpaper, a
mild abrasive and an attachment
for a drill to polish my BN2's
windshield. IIRC, I got it from
Eastwood:<br clear="none">
<br clear="none">
<a rel="nofollow noopener
noreferrer" shape="rect"
target="_blank"
href="https://www.eastwood.com/glass-polishing-kit-for-deep-scratches.html";
class="yiv5251287396moz-txt-link-freetext moz-txt-link-freetext"
moz-do-not-send="true">https://www.eastwood.com/glass-polishing-kit-for-deep-scratches.html</a><br
clear="none">
<br clear="none">
The 'rule-of-thumb' is if the
scratch can be felt with a
fingernail it can't be removed,
but my car had mostly mild wiper
wear and the kit did the job well
enough I can live with it.<br
clear="none">
<br clear="none">
Bob<br clear="none">
<br clear="none">
</p>
<div>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal">On
9/29/2023 3:41 AM, Robert
Markovich via Healeys wrote:</p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt;">
<p style="margin-bottom:12.0pt;"
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal">There
are some some places that polish
windshields. But ultimately it
may be more cost-effective
to simply replace. Triplex is
the brand to use; an OEM
manufacturer that supplied them
back then. The rest often donâ??t
fit right and eventually crack
from stress points, as Iâ??ve
found. <br clear="none">
<br clear="none">
</p>
<div>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal"><a
rel="nofollow noopener
noreferrer" shape="rect"
target="_blank"
href="https://apps.apple.com/us/app/aol-news-email-weather-video/id646100661";
moz-do-not-send="true">Sent
from the all new AOL app for
iOS</a></p>
</div>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal">
 </p>
<p style="margin-top:0cm;"><span
style="font-size:11.5pt;color:#715FFA;">On
Friday, September 29, 2023,
2:01 AM, i erbs <a
rel="nofollow noopener
noreferrer" shape="rect"
ymailto="mailto:eyera3000@gmail.com";
target="_blank"
href="mailto:eyera3000@gmail.com";
moz-do-not-send="true"><eyera3000@gmail.com></a>
wrote:</span></p>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt;">
<div
id="yiv5251287396ydp975197d1yiv6310450809m_3319096111410648268yiv1571707645">
<div>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal">Howdy
all </p>
<div>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal">Is
there any proven way to
remove wiper blade
scratches from a
windscreen?</p>
</div>
<div>
<p
style="margin-bottom:12.0pt;"
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal">Thanks all </p>
<div>
<p
class="yiv5251287396ydp975197d1yiv6310450809MsoNormal">Ira
Erbs<br clear="none">
Milwaukie, OR<br
clear="none">
1959 Austin Healey
100-6<br clear="none">
1967 MGB Roadster</p>
</div>
</div>
</div>
</div>
<br clear="none">
</blockquote>
</blockquote>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br clear="none">
</div>
</div>
</div>
</blockquote>
</div>
</blockquote>
<br>
</body>
</html>
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_______________________________________________
Archive: http://www.team.net/pipermail/healeys
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