http://www.66autocolor.com/1K_ACRYLIC_CLEARCOAT_AEROSOL_p/spm-3680058.htm
So for just a clear, the link above would be solvent proof?
I don't think so. It's a one part paint and they are usually not solvent proof. They also have the clear in a two part paint that would hold up better to solvents and gas. In theory you should not put a two part catalyzed paint over one part paint as it can lift the paint. Does not seem to be a problem for many who have done it but I would want the underlying one part paint
well cured before overcoating. Me...I go with two part all the way, epoxy primer, color coat, and clear if using 2 stage paint. The cost is not all that much greater (for single stage) and you have a more durable finished product.
Clearing up a few terms
2 part or 2K paint.........uses a catalyst for curing and durability
1 part or 1K paint.........air dries by solvent evaporation not as durable
single stage paint.......gloss and color in one paint
two stage paint..........color base coat and then a clear coat for gloss.
Instead of a 2 part clear coat over cheap rattle can junk why not use a single stage 2 part paint and appropriate primer. You put on a few more coats and you don't need the clear coat. The additional coats allows you to buff out the paint years down the road when it needs it. The cost is not that much greater. Two stage paint requires more finesse in applying but gives a very glossy wet look.