Senior Moment Member
Join Date: Jun 2011
Location: West Vancouver B.C.
Thanked 118 Times in 113 Posts
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600 grit is not too fine - that is standard practice for show quality paint on cars. You only need a lack of gloss to promote adhesion.
My bet is the acetone, esp. if you have been using "gun cleaner" or other recycled / cheap acetone.
Use the recommended prep wash, the new multi part paints are insanely sensitive to anything that is less than perfect - the price you pay for their incredible qualities after curing.
I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.