..2k PU coating containing solvent and the worst: polystyrene foam dissolved in acetone - LOL. Which AIs (free?) are you using to find technical informations like these ? What is your experience ?

I was really surprised, because this was the first time I got a direct answer without any prompt fiddling from this and other models. Yesterday, e.g., I asked for transparent protection coatings for polystyrene foam. I got 3 answers, 1 was trivial -epoxy. 2 were complete BS...