Bondo, in its final stages of curing will burn your badly if you over did it with the catalyst. It is a chemical reaction and so it wont stop until it is done curing.
Resin is the same. I basically melted a plastic bag with a whole chunk of resin with alot of hardener as a test to see what it does.
Dont wash it off with alchohol or any other solvent. Believe it or not, you can start an even worse chemical reaction.