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I agree with the use of tape. Rather than using a punch, I like the
idea of just using a hand-held sharp drill bit. Sharp is the key
word here. Then gradually open up using bigger drill bits. When
getting close to the final size, I use a tapered reamer (by hand).
This gives a good finish, and also allows close control of the
diameter.<br>
<br>
Mike<br>
<br>
<div class="moz-cite-prefix">On 4/12/2016 5:21 AM, Simon Lachlan
wrote:<br>
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<blockquote
cite="mid:001801d194b5$e35e3b10$aa1ab130$@lachlan@homecall.co.uk"
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Well,
I’ve always done this.<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span
style="mso-list:Ignore">1)<span style="font:7.0pt
"Times New Roman""> </span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Put
a piece of masking tape over the drilling point. Then
another over that. Push them down tight so they’re making
close fit.<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span
style="mso-list:Ignore">2)<span style="font:7.0pt
"Times New Roman""> </span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Mark
the start position through the tapes with a bradawl.<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span
style="mso-list:Ignore">3)<span style="font:7.0pt
"Times New Roman""> </span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Start
drilling with a hand drill and a small, sharp(!!) drill bit.
Sharp bit. Slow, steady pressure. Nice and straight so no
skidding.<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span
style="mso-list:Ignore">4)<span style="font:7.0pt
"Times New Roman""> </span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Drill
a nice little pilot hole. You should be OK by hand and, I’m
guessing, that the metal isn’t too thick if it’s painted.<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span
style="mso-list:Ignore">5)<span style="font:7.0pt
"Times New Roman""> </span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Go
up a size drill bit and drill with an electric drill, nice
and steady does it. Keep it slow and straight so it won’t
want to jump out.<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span
style="mso-list:Ignore">6)<span style="font:7.0pt
"Times New Roman""> </span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Keep
going up in size until you get the right size hole.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Don’t
forget what may be lurking on the other side of the painted
surface...it may not like being drilled!<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US"> Healeys
[<a class="moz-txt-link-freetext" href="mailto:healeys-bounces@autox.team.net">mailto:healeys-bounces@autox.team.net</a>] <b>On Behalf Of
</b>Michael MacLean<br>
<b>Sent:</b> Tuesday, April 12, 2016 8:30<br>
<b>To:</b> Healeys Help<br>
<b>Subject:</b> [Healeys] Holes in Painted Surface<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div id="yui_3_16_0_ym19_1_1460445982370_18849">
<p class="MsoNormal" style="background:white"><span
style="color:black">What's the best way to drill holes
in a painted surface?<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span
style="color:black">Mike MacLean<o:p></o:p></span></p>
</div>
</div>
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</blockquote>
<br>
<div class="moz-signature">-- <br>
Mike<br>
<br>
MGTD (long gone)<br>
BN1 (long gone)<br>
BN2-100M (gone but in good hands)<br>
BJ8</div>
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