Can anyone give me an indication of how much of different solvents can be included in a product (legally, and of course with a flamability PGII class). Solvents like toluenes, MEK, THF, acetone etc. Is there a web site resource i should be looking at? Whats in the solvents we buy as consumers, like gun cleaning solution and nail polish remover (obviously mostly acetone). How much can i have in my products?