On a hunch, I decided to try and spray some stripper onto an UNpainted lamp. I just couldn't figure out why in the world only the inside of the cap anodised! I knew why the base didn't, and that's because I didn't connect the power correctly, but the cap? My friend who is helping me said something about aluminum being pre-anodised sometimes in order to seal it to keep it from oxidizing...but how did they anodise it without getting ALL of it? There must be something sprayed on there...
...And there WAS!
After letting the stripper sit upon the lamp parts for a few minutes I wiped it off to find that it removed a layer of...something...from the aluminum! THAT is what was keeping the parts from anodising!
And I can get that crap OFF!
YAY! I am SO going to try again to anodise tomorrow...