Check out www.caswell.com
they have the best anodizing supplies I have seen. (its what I use) I recomend checking out there forums, there are a lot of things there that can be very helpful.
Also check out: https://www.focuser.com/atm/anodize/anodize.html
Good luck! and be careful!
Check out my gallery and you can see a few things I have done.