I have some cheap old AHM HO cars I hammer with first. The paint did not act all crazy on the details when I praticed on one of them prior. But it already had a base coat when I sprayed.. so you might have a point on the paint being too hot thou on the raw plastic.
Again I can't imagine I was too far off on the 3/1 mix.
I think at this point I'm going to try to lay down another coat, then if that doesn't give me the results I'm looking for, off to the stripper... wait .. nevermind..
