Aluminum primer
When I worked in an electrical shop, receiving half-finished parts from our in-house welding and machine shop, the aluminum parts were primed and corrosion-treated with a process called Alodining.
I tihnk it's a trade name for the chemical. And it seemed to be iodine. (Imagine that). It involved washing the parts in a light acid, then clear water rinse, then they entered the Alodine solution and waited for about 10 minutes. Then another water rinse and the part would be golden, and ready for primer and paint.
Seemed pretty foolproof, and the materials were non-hazardous. We're talking about a DILUTE solution of acid and of the iodine mixture.
Maybe a local machine shop can help with this.
These days, though, lots of cars have aluminum body panels, so body shops are dealing with the issues all the time. Long term, poor aluminum prep work results in white, bubbly corrosion under the paint. So they must do SOMETHING to prep the aluminum before priming and finish painting. I'd go ask at a paint store, Sherwin-Williams or Benjamin Moore or anyone selling REAL paint to the body shop pros.
--=={{Rob}}==--
