Originally Posted by DannoXYZ
Easy way to remove the anodizing is to use oven-cleaner (sodium-hydroxide). Spray on, let sit for 10-15 minutes, scrub off with scotch-brite pad.
Sodium hydroxide not only strips the anodizing, it dissolves the base aluminum (and, incidentally, your skin) too. Be very careful using it. You can distroy the parts if you aren't very diligent.