Cleaning filler dust before next round of epoxy?

MKH

Promoted Users
Hi, I sprayed 2 coats of SPI epoxy and applied filler. Sanded filler and ready for another round of epoxy as I had many breakthroughs. What is the recommendation for cleaning all the filler dust before spraying the epoxy? Just blow it off with air or use a cleaner. I do have SPI waterborne and solvent based cleaners. Thanks
Mike
 
I blow it off with compressed air, wipe it with dry microfiber cloth or blue paper shop towels, then mist with solvent WG cleaner, wipe that off and let it dry 60 minutes.
I do most of the work with nitrile gloves and try to minimize touching bare metal or filler with bare hands, but sometimes need to feel it. Also, handling tools etc. with gloves is bound to pick up some oil or contaminate that needs to be cleaned off.
 
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Pretty much the same as Dean, but I only use blue shop towels for wiping off W&G remover. You can also speed up the drying of the W&G remover by spraying with compressed air, but it is a good idea to wait at least 30 minutes before applying more epoxy.
 
Maybe some other guys will chime in, but I say thats true for everything else. With bondo the dust may mix right in if you're applying more bondo, I'm more concerned with droplets hiding in pin holes.
Edit: What I mean is when cleaning everything else such as primer, paint, clear, etc, yes spray the cleaner on and wipe it off. But with bondo I think a mist on the shop towel then wipe with that, but if its being top coated with more bondo its not a bid deal. Compressed air and a towel works great. It depends on what its been exposed to.
 
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I'm with Don I try and avoid the filler. I did yesterday anyways. But I'm curious what would be the proper dry time for the spi solvent WG to evaporate. If u apply anything over it too soon, what would happen?
 
I've never had a problem wiping filler with W&G remover. One thing I've done for as long as I can remember, is blow the surface off with a dry rag after wiping and drying. Any W&G that puddles in cracks and crevices can cause problems with the coating having poor adhesion, blisters, solvent pop, and what looks like separation or fisheyes. Blowing it gets it out in the open where it gets wiped and can evaporate. If you do this, it cuts the wait time way down. If you are not doing production work, I would still wait 30-45 minutes to be safe.
 
I've never had a problem wiping filler with W&G remover. One thing I've done for as long as I can remember, is blow the surface off with a dry rag after wiping and drying. Any W&G that puddles in cracks and crevices can cause problems with the coating having poor adhesion, blisters, solvent pop, and what looks like separation or fisheyes. Blowing it gets it out in the open where it gets wiped and can evaporate. If you do this, it cuts the wait time way down. If you are not doing production work, I would still wait 30-45 minutes to be safe.
Thanks!
 
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