FINALLY!
After trying to hand sand the first one with disasterous warping results my gf hooked me up with an spray can of "Aircraft Paint Stripper" which would strip the paint, but not damage the aluminum of the casing. 7 days and many, many, many different levels of sandpaper grit later the lid is finally nearly totally smooth and polished to a mirror finish. Only problem is that it now shows finger prints constantly!
check it out!