I have a small project I want to spray with Rustoleum gloss black. Wondering if mineral spirits or acetone would be better to thin it with and how much? So far I've seen 10%, 25% and 40%. I have also seen that adding a hardner may help. I know many of you have painted your frames with it, so thought I'd see what tips I can get.

Eric
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'57 Chevy 3100 (Little Red)
'81 RD350 LC - Fun, Fun, Fun
'83 GS1100E - Pocket Rocket