I am not normally a visitor here, but my lunch time drinking
acquaintance is trying to bring his collection of smoking pipes back to
the original condition.
Problem is, a pipe stem made from vulcanite has taken on, not the black
colour that it should be, but a much lighter brown one. He knows that
light can change the colour, but wants to know how to get the black
colour back. Is it simple to do?
TIA
Dave
