I bought a can of mineral spirits to clean up after caulking the tub with silicone, it is also called Specs Paint Thinner. Laquer thinner is usually MEK (methylethylketone) which will attack plastic. On the Cole-Parmer site there is a lot of info on chemical compatibility:
http://www.coleparmer.com/Chemical-ResistanceSlot car bodies are mostly ABS or styrene I think. According to that reference mineral spirits do not play well with ABS. Denatured alcohol is ethanol with some nasty stuff added so you can't drink it, it is OK with ABS if you don't soak it for very long periods of time.