If it's laser etched, you're not going to "remove" it at all - you'd only be sanding down surrounding areas so the logo isn't as visible. A better option if it's etched is to remove all the anodizing as bare aluminum will make the logo far less conspicuous.

I don't know how the logos are placed on the Chris King headsets, however, I have some experience with removing silk-screening.

First, try a standard, pink eraser. You might test this on an inconspicuous area to make sure it doesn't take the anodizing off - usually it doesn't.

Next step up is to try a blue, abrasive pen eraser. Be VERY cautious with this as it's much more likely to remove the anodizing.

Finally, if you don't mind having a bare aluminum headset, BLEACH!

Household bleach will remove anodizing from aluminum. Soak the part in it. Rinse with water when done and dry thoroughly.