Hi, Shelley. Without seeing the doors and your set-up, I would sure consider spraying from spray cans. Rust will be your biggest concern, now and in the future. I would sure consider spraying Rustoleum primer, then 2 coats of Rustoleum paint. You can mask around the doors, tape newpaper up and on the floor. There will be quite a bit of overspray. Just follow the directions for spraying on the can and you will get a nice smooth finish. If you can't find a color in the paint department, try an auto parts store.