"Ed Wischmeyer" wrote in message
...
Anybody have any favorite techniques for doing big pieces? I've not been
able to find any alodyne tanks locally, and I've only got a gallon each
of aluminum cleaner (phosphoric acid) and alodyne. The option is to use
a self-etching primer on the inside.

I went with PPG DX-1791/1792 self etching primer. It is chromated (i.e. good
stuff) and can kill you if you try hard enough. I love that stuff.