Home painted ,car guys.....

way back in the 70's, I would buy gooseneck horses trailers and have them sandblasted and I would prime, with laquer primer and paint with auto alklyd enamel. I then went to acrylic enamel with gloss hardner. night and day different in the look.

the only thing I would wonder about with oil based "hardware" or tractor enamel is the durability as to UV problems? I really don't know.

I had a hood with lots of surface rust . I D A'ed it, ran the right angle grinder with big wire cup to clean the pits, treated it with Ospho, AFTER it dried good, I applied oil based enamel. 6 months later, I wanted to see what I had. I tried to D A the stuff off. I gave up!!!! LOL I sprayed epoxy primer over it, smoothed a few dings, and sprayed high build primer over that. 6 months later again, all is good and sitting out in the weather.