I had a set of wheels that were quite rusty inside, I chiseled the rust off them, wire wheeled them, painted them with Jasco and then primed them inside. When I picked them up after the new tires were mounted they said they put 90 PSI in them. I backed them down to 40 PSI. That was several years ago. They drive smoother and I felt safer. Not doing a lot of heavy towing or any towing!

1946 C.O.E. with a Holmes Traffic King Wrecker