Is a spray can of Krylon Epoxy Appliance Paint a suitable product for a bike, that doesn't require primer? (I think it's the only epoxy paint I can find in my area). What would be more durable and less prone to chipping/scratching; that or just sloshing a few coats of rust-resistant liquid paint for metal on the frame. Don't care about brush strokes and a professional looking job; I don't want it to attract attention of thieves anyway. If liquid paint for metal is better, is primer or clear coat necessary?

I have spray painted my frame in the past with regular spray paint for metal, and used a spray primer, but never stripped the original finish, because I wanted that to help protect the bare metal. The frame looked awful eventually, chipping to where the bare metal was exposed, and the frame started rusting. I don't want to repeat the same mistake, but nor am I interested in the expense of having a pro do it.