hey charlie, explain the burning with acid option.....you mean like clr or something much stronger?...and masking with oil?..you mean like baby oil, will that last or wear off very soon?....
Hydroflouric acid kills sickness, but leaves a haze.. stuff like CLR doesn't quite get to the heart of the matter. Mineral oil will stay clear for ages if the bottle is sealed with a cork or somesuch, but just don't let any dust or insects get in.. and don't put it up for sale without disclosure! []