Trailer tires

[Too Many Projects]

Yes, on the separation of dis-similar metals. All it takes is a layer of clear packaging tape. Hope you did something similar, Wilma.
In the early-mid 80's Peterbilt was done with their mild steel west coast mirror frames rusting prematurely in the salt states and went to stainless brackets. Several years later, they learned of their mistake when the paint around the brackets was failing under warranty and the corrosion issue was discovered. Cost them a bit to replace doors for a while. Even my '92 didn't have any insulation, which I added as soon as I bought it, in '95.
Bill, I don't use stainless bolts, as they will still react where they touch aluminum. I use grade 8 bolts with a zink coating and anti-seize on them. I install them in a manner that I never have to turn the bolt and scratch the zinc, only turn the nut...