Hey man that's interesting. I hadn't heard of it before tried it myself on a whim and it seems to work slick! My wife was irritated that I stole her nail polish remover to clean guns
It started out by accident. I didn't have any rubbing alcohol on hand and was applying hexagonal boron nitride to the bore of a rifle I thought I had very thoroughly cleaned already (my method is usually to suspend the hbn in alcohol and apply via soaked cotton patch run through - acetone is self drying like alcohol, evaporates) so I used acetone instead…works great with hbn treatment BUT…my patch through the "clean" bore cleaned with normal gun cleaning solvent came out dirty! That acetone was picking up carbon the other stuff wasn't.