Just got some Kalloy risers, and I found that one can easily remove the "painted" on logos (not sure exactly what they use) on top of the clear coat by rubbing gently with some grade #0000 steel wool.

This worked perfectly. The logos rubbed off, and there wasn't a single scratch left on the clear coat. I dunno if anyone else already knows, just passing this tidbit of info on to anyone else who's interested.

A little dab of Acetone will frequently help the process along if it's being stubborn.

Careful, I tried acetone on some Truvativ cranks and it turned out the logos were just 'holes' in the black anodizing.

My cranks now have a nice shiny silver streak through the logo.