Yep caustic soda is the best but make sure you get all stickers,glue, muck or anything thing that shouldnt be there off as it will etch (term used in anodising) around these bits and leave it raised and what ever you do DONT LEAVE IT !!!!! If the caustic is warm (about 50-60 degrees C) it will strip in seconds but be carefull of fumes and splashes. Make sure they are rinsed well and dried straight away because caustic if not rinsed well can keep on working, i know cos it did it to my leg.
I have seen may bike parts etched to death and its not a easy to put right after, makes polishing harder and the anodising finish look crap.
Just a bit of advice not tring to put you off. need any more advice im happy to help
Regards
Paul