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Old 09-03-2006, 08:15 PM
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Pinholes in single stage over FG

OK, I've done some searching for pinholes, but all of them that I've seen before, recommend sanding back down to the glass and starting over. I know I'm lazy, but I'd rather not.

Here's some background. I just finished building some glass over foam bumpers for the wagon. Not molded, but built up with foam over wood, sculpted, covered with mat and glass, then covered with fleece and soaked with resin. Trust me when I say that there's not a single square inch of these things that hasn't been sanded!! After using Rage filler and spot putty, primer/filler and more sanding followed by the recommended sealer, I sprayed on DuPont ChromaOne.
99% is great, but I've got one spot, about the size of a tennis ball that has a bunch of pinholes.
Is there a way to seal these off and paint over them without having to take it back down to the resin? If it were on the sheet metal, I wouldn't hesitate, but since it's on glass in a somewhat inconspicuous spot, can I shortcut the "right" way and still have good results?
Thanks, all.
I'll try to post pics in my photo album soon to show how I built these things.

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Old 09-04-2006, 04:53 AM
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I would think sanding the area and filling them with a 2 part spot putty would be fine. Sand the spot putty with a finer grit or even wetsand, if you press down tight and don't make a mess, many of the spot puttys sand pretty good when its only spread for filling pinholes. Then sand the rest of the part and spray the area with your spot putty with epoxy primer reduced as a sealer and paint. Or you could use a 2k filler primer where you pinholes are and sand your spot mud down to 180 grit or finer, and then final sand the primer before paint. I don't think you would necessarily have to go down to glass, specially being its one isolated area.
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Old 09-04-2006, 04:27 PM
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Thanks, Ken

Is the 2 part putty you're talking about similar to red spot putty? NitroStan putty is what I have on hand. Would this work? I know it shrinks like crazy, so it may take a couple of applications.
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Old 09-04-2006, 05:37 PM
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Do not confuse "2 part putty" with the cheap "spot putty" that you buy at Advance or one of the other auto part stores. It is mixed like regular bondo, with a hardener creme. If it is a one part putty, it is JUNK, and will shrink after being painted.

Aaron
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Old 09-04-2006, 06:23 PM
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Lots of red putty.

Uh oh. That's ot the kind of news I wanted, but good to know for any future projects.
Do you have a brand in mind for the 2 part putty?
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