Hiya all and seasons greetings. So I was kicking about a bargain store and I came across little stainless steel flasks BUT they are already marked. The mark is very durable so I am guessing cermark/thermark. Anyway these little fellers were 99 cents each so I bought nine and now my question, what is the easiest way to remove the thermark. I did use a high speed grinder on one and it worked but ate the metal too much. Any and all advice would be appreciated.. Thanks gang