Technical & Reference Section > Tech and Restoration

removing anodized from alloy

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Dr.Robotnik:
Raw caustic soda/lye is best and is sold as drain un-blocker at supermarkets.

Oven cleaner does work because the active ingredient is caustic soda/lye however the glycols within the oven cleaner leave microscopic pits/contaminants within the alloy (alloys are porous) which will show up if you re-annodise.

To summarise, if you are just polishing oven cleaner is fine, if you are going to anodise afterwards then use straight caustic soda/lye.

oldschoolib:
big thanks to dr robotnik

customparts:
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

oldschoolib:
thanks for the reply custom i went the  oven  pride way and it work so well ive done some other stuff and it seams to of worked out well apart from the burns on my hands  ;D

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