[Robert Beede]

I know that the early cars had Black paint on the Resevoirs. One has to be careful when you mess with this little cans, cause all you do is create more problems for yourself. Case in point..chroming. Chroming the outside strips the tin from the inside. Tinning is the most corrossion resistant surface to guard against rust forming in the fluid reservoir. And, the inside of the reservoir can not be tinned commercially without dipping the canister back into etching fluids which take the outside chrome off.

The only way I found to recoat the inside with Tin and keep the outside chromed was to turn the inside of the reservior into the reaction vessel for the tinning process, and make its surface the proper charge for tin deposition.

I do not know what trials one experiences with powder coating. The can has to reach a temperature of about 350 degrees, right? At what temperature does the solder sealing the seam and the bottom fitting melt?

Anyway, Those are my thoughts, and I hope they have some value!

Bob