Quote:
Originally Posted by black94t
Well, I do rinse after blasting. I rinse with hot water and/or I'll wipe it down with acetone. I read somewhere that acetone softens aluminum, not sure how that affects the coating, but some are saying to use denatured alcohol. I picked some of that stuff up tonight. We'll see how that works.
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Acetone will not soften aluminum. It will soften powder. If you sand a 1st coat to apply a second (for whatever reason) don't use acetone to wipe down. Thats where the denatured alky comes in. Try this:
1. clean/degrease (rinse well)
2. Blow dry with clean air
3. blast
4. Out gas 50 degrees above cure temp for an hour
5. clean/degrease again (rinse well) or blast again (this is where the debate lies on which is better to do after outgassing).
6 Blow off with clean dry air
7. Coat and cure.
As a side note: I don't wipe down blasted surfaces with lint free rags and acetone or denatured alky anymore. After blasting it's just a back type shower brush and clean dry air. If you feel you need to wipe them down it helps to go over the part with hand held propane torch to remove any rag lint.