I have my tire off my rear rim and inside there is some surface rust . i going to sand it and paint . I was going to use rustolem or are there better products, also the outside too.
Kubota B26 TLB, Allis Chalmers D17 series IV, Kubota ZG-23 Mower, Kubota ZD 1211, Kawasaki Mule 610, Stihl 361, Stihl 045 AV Super, and a Stihl 660 Ported and tuned
I would remove all rust, dirt, loose paint, etc.. on areas that had rust previously I would brush on a coat of Must For Rust and then use a couple of good coats of Rustoleum primer, then Rustoleum paint as a top coat. Rust remover
Another option: I have had good luck with POR15 for a super tough finish on tractor rims. -POR-15 Inc.
POR 15 has a reputation for chemically bonding w/ rust to stop it. It is expensive and it works. Internal rim corrosion will eventually ruin the rim from the inside out so dealing with this is the right thing to do.