if its not etched in, but printed? try acetone (or nail polish remover that's not marked acetone free)
if its etched in, good luck!
Hadn't thought of getting the dremmel out.... Might be a plan
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The green scrubbing pads and some elbow grease usually shift them, failing that use the really fine wet and dry, youll get a nice brushed effect providing you turn the thing just one way, dont do circles...