[2scoops]

Hi,

I don't really like using Sodium Hydroxide (caustic soda) to remove the Aluminum Oxide before annodising because, apparently, it attacks alumium as well as the oxide and because one drop in the eye and you're blind. Can anyone reccomend an alternative (and concentration) that I could use.
I have access to a chemistry lab so use fume cupboards and should be able to get hold of any chemicals.