My sink and bathtub faucets both had a lot of water deposits on them, so I put white vinegar in bags and used rubber bands to secure those to the faucets and left them there for a few hours. When I returned, the dark brown metal faucets had a sort of plastic peeling off of them and the dark color is going everywhere. I am assuming that plastic stuff is the finish? Is it safe to keep using those faucets? It isn't really affordable right now to replace them, but I don't want to release toxins or anything like that into the water.