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Several years ago I was stripping the frame on my 67.5 Datsun roadster using=
a pressure washer with a media blaster tip & was really surprised, not only=
how fast it stripped down to bare metal, but how fast it flash rusted. With=
in a few minutes of blasting, it rusted. I finally had to blast a minute or s=
o, then dry & phosphate coat it before continuing. The phosphate I used need=
ed to be washed off before priming which added to the process. Wish I could h=
ave found some of the phosphate that didn=E2=80=99t need washing but nobody s=
tocked it.=20
Peace,
Pat
Pat Horne=20
We support Habitat for Humanity
On Nov 13, 2022, at 4:41 PM, John Innis <jdinnis@gmail.com> wrote:
=EF=BB=BF
I often use phosphoric acid to clean and de-rust fuel tanks before coating w=
ith an epoxy sealer. I find it works great for getting ALL that last rust o=
ut and etching the surface nicely. As I am sure you recall, you must clean a=
nd paint immediately. Steel etched with acid will be highly susceptible to c=
orrosion if not coated right away. I like to clean with water to neutralize=
the acid then immediately rinse with solvent to get rid of the water. Dena=
tured alcohol works great to dry the water, but might not be compatible with=
all types of primer. =20
On Sun, Nov 13, 2022 at 3:31 PM Jim Stone <1789alpine@gmail.com> wrote:
> The last time I painted a car was in the 1980=E2=80=99s, which I=E2=80=99m=
pretty sure is before the invention of self-etching primer. If it was arou=
nd then, I didn=E2=80=99t know about it. I learned everything I knew from r=
eading DIY books and used a phosphoric acid solution to etch bare metal befo=
re priming. I haven=E2=80=99t heard of anyone doing that anymore, but need t=
o prime a trunk lid and am thinking it might be worth a phosphoric acid wash=
first. I had the lid dipped about 10 years ago and it was left untreated a=
ll this time. (Not by me, but that is a different and longer story.) The l=
id has been sitting on the car and the underside still looks nearly perfect.=
The car with has always been garaged but the top had a light coating of ru=
st. I=E2=80=99ve removed that now but there are some pits here and there (p=
robably from before the dipping) and I would like to be 100% sure it is rust=
free before priming it. =20
>=20
> I have a gallon of this sitting around: https://www.amazon.com/Klean-Strip=
-GKPA30220-Gallon-Phosphoric/dp/B00945D15I Is there any reason not to wash t=
he surface with a diluted solution before priming? Or, should I just use so=
mething like Rust-Oleum Rust Reformer (https://www.rustoleum.com/product-cat=
alog/consumer-brands/auto/removers-and-chemicals/rust-reformer-spray/) and c=
all it a day?
> _______________________________________________
>=20
> Shop-talk@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.96
> Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/arc=
hive
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/jdinni=
s@gmail.com
>=20
--=20
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=3D=3D=3D=3D=3D=3D=3D
=3D Never offend people with style when you =3D
=3D can offend with substance --- Sam Brown =3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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_______________________________________________
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Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archi=
ve
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">Several years ago I was stripping the frame=
on my 67.5 Datsun roadster using a pressure washer with a media blaster tip=
& was really surprised, not only how fast it stripped down to bare meta=
l, but how fast it flash rusted. Within a few minutes of blasting, it rusted=
. I finally had to blast a minute or so, then dry & phosphate coat it be=
fore continuing. The phosphate I used needed to be washed off before priming=
which added to the process. Wish I could have found some of the phosphate t=
hat didn=E2=80=99t need washing but nobody stocked it. <div><br></div><=
div>Peace,</div><div>Pat<br><br><div dir=3D"ltr">Pat Horne <div>We supp=
ort Habitat for Humanity</div><div><br></div></div><div dir=3D"ltr"><br>On N=
ov 13, 2022, at 4:41 PM, John Innis <jdinnis@gmail.com> wrote:<br><br>=
</div><div dir=3D"ltr">=EF=BB=BF<div dir=3D"ltr">I often use phosphoric acid=
to clean and de-rust fuel tanks before coating with an epoxy sealer. I=
find it works great for getting ALL that last rust out and etching the surf=
ace nicely. As I am sure you recall, you must clean and paint immediat=
ely. Steel etched with acid will be highly susceptible to corrosion if=
not coated right away. I like to clean with water to neutralize t=
he acid then immediately rinse with solvent to get rid of the water. D=
enatured alcohol works great to dry the water, but might not be compatible w=
ith all types of primer. <br></div><br><div class=3D"gmail_quote"><div=
dir=3D"ltr" class=3D"gmail_attr">On Sun, Nov 13, 2022 at 3:31 PM Jim Stone &=
lt;<a href=3D"mailto:1789alpine@gmail.com";>1789alpine@gmail.com</a>> wrot=
e:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.=
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style=3D"o=
verflow-wrap: break-word;">The last time I painted a car was in the 1980=E2=80=
=99s, which I=E2=80=99m pretty sure is before the invention of self-etching p=
rimer. If it was around then, I didn=E2=80=99t know about it. I l=
earned everything I knew from reading DIY books and used a phosphoric acid s=
olution to etch bare metal before priming. I haven=E2=80=99t heard of a=
nyone doing that anymore, but need to prime a trunk lid and am thinking it m=
ight be worth a phosphoric acid wash first. I had the lid dipped about=
10 years ago and it was left untreated all this time. (Not by me, but=
that is a different and longer story.) The lid has been sitting on th=
e car and the underside still looks nearly perfect. The car with has a=
lways been garaged but the top had a light coating of rust. I=E2=80=99=
ve removed that now but there are some pits here and there (probably from be=
fore the dipping) and I would like to be 100% sure it is rust free before pr=
iming it. <div><br></div><div>I have a gallon of this sitting around: <=
a href=3D"https://www.amazon.com/Klean-Strip-GKPA30220-Gallon-Phosphoric/dp/=
B00945D15I" target=3D"_blank">https://www.amazon.com/Klean-Strip-GKPA30220-G=
allon-Phosphoric/dp/B00945D15I</a> Is there any reason not to wash the=
surface with a diluted solution before priming? Or, should I just use=
something like <span style=3D"color:rgb(34,34,34);font-family:"He=
lvetica Neue",Helvetica,Arial">Rust-Oleum Rust Reformer (</span><a href=
=3D"https://www.rustoleum.com/product-catalog/consumer-brands/auto/removers-=
and-chemicals/rust-reformer-spray/" target=3D"_blank">https://www.rustoleum.=
com/product-catalog/consumer-brands/auto/removers-and-chemicals/rust-reforme=
r-spray/</a>) and call it a day?</div></div>________________________________=
_______________<br>
<br>
<a href=3D"mailto:Shop-talk@autox.team.net"; target=3D"_blank">Shop-talk@auto=
x.team.net</a><br>
t=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/shop-talk"; rel=3D"noreferr=
er" target=3D"_blank">http://www.team.net/pipermail/shop-talk</a> <a href=3D=
"http://autox.team.net/archive"; rel=3D"noreferrer" target=3D"_blank">http://=
autox.team.net/archive</a><br>
<br>
lk/jdinnis@gmail.com" rel=3D"noreferrer" target=3D"_blank">http://autox.team=
.net/mailman/options/shop-talk/jdinnis@gmail.com</a><br>
<br>
</blockquote></div><br clear=3D"all"><br>-- <br><div dir=3D"ltr" class=3D"gm=
ail_signature">=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>=3D Never offend people with style w=
hen you =3D<br>=3D can offend with substance --- Sam Brown =
=3D<br>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div>
<span>_______________________________________________</span><br><span></span=
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Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive
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