i got this green mark on a harvest gold bathtub.... the tub is in
perfect shape and looks really nice, but it seems the copper or brass
inside the fixtures must be oxidizing and leaving a deposit right where
the water faucet lets the water hit the bottom of the tub...
Question: what can i do to get rid of this green copper oxidation
stain??? i dont want to use anything too strrong on the tub as its in
real nice shape...