"Hard anodizing' is really a misnomer. All anodizing is very hard, by changing the acid concentration you can make a slightly harder surface, but this is not suitable for dying.
2. Can you matte electroless nickel using zincate on top of an anodized layer of such a part and retain strength? If so, how thick would this new zincate/nickel layer be?
Anodize is an insulator, therefore you can't plate on top of it.
3. How well would a person prepare an anodized surface for application of Teflon? I was thinking using a light pressure blast, just enough to scuff up the surface

What are you trying to do here? Why do you need the teflon surface?
We will be bringing out a new EN system shortly. Watch the web page for details.
Your suggestions are greatly appreciated!!!
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