The winter rims on my 2011 Kia Optima are staring to rust. Numerous spots on the outside and all along the weld on the inside. When I changed the tires a couple weeks ago to my summer tires, I sanded the rusty spots to bare metal and painted the whole rim with RustDestroyer primer. Any suggestions as to a durable, long lasting final coat? I think I did a very good job on the prep work so I want this paint to last a few years until I get rid of the car. I used Temclad on my Daughter's rusty winter rims last year and they look terrible this year. A friend mentioned urethane spray but it is very expensive in Canada... $33.00 a can.