Graham watch, crystal coating removal?

[Crimson Vanguard]

Hey i have a graham chronofighter,.,. the crystal has some sort of blueish anti glare coating on it that has scratched and worn off a bit with time, how can I get the rest of it off so the crystal is just clear and smooth throughout?

[lanikai]

You can use a dremel and metal polish.. some members use ammonia.. acetone which is found in good quality nail polish remover.. it should be doulbe sided but it sounds like your just concerned with the outside