You'll get 2 arguements here:
1. It's a chracter mark and tool, so live with it.
2. Damn, that sucks, love it when a light stays minty, try to fix it.
I tend to baby my stuff so #2 for me.
I messed up an L2T a bit and ended up using a bit of marker, it seems to work okay.
I've heard of a thing called aluminum black, likely works better? You could also carefully sand down the rough edges and then marker it (perhaps a little less noticable after you smooth out the pits).
What I recently did to a black L0D was strip off all the anodizing with oven cleaner and polish it. The finish is now slippery and a bit fragile (bare aluminum) but it's kinda neat and any more marks can be buffed out somewhat.
Not ideal, but just a suggestion...