Dave Watson suggested using Zinc Chromate primer and I dare say some types
are suitable. Any ZC primer simply wont do especially if it is not an etch
primer (usually this comes as a two part and so a spray system is desirable
although I have used a brush.
The important thing is that whatever primer you use it mustbe an "etch
primer" as the normal "car" variety will simply chip off very soon. I learned
the hard way and did just that.
Anodising still seems to be the best option
BTW someone mentioned a DIY system of anodising recently. Does anyone have
details of this system and is it available in the UK. Since I am having to
redo many of my bits I considered this idea otherwise I will resort to using
my etch primer.
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