If you want to change the color of your shoes, pour some sulfuric acid on them. Sure, your shoes will turn into utter useless mush, but you can transform a khaki canvas color into a deep purple with only a few globs of acid.

Outside of the color change, it seems as if the shoe holds up valiantly against the acid, but really, the acid totally destroys it. The threading in the shoe dissolves in minutes and the rest of the shoe basically falls apart on contact.