I recently rebuilt my dads golf cart and used spray on bed liner for the metal. A frame blasted and sprayed in bed liner would be totally bulletproof. I would do the skid plates too. If you want bling, then this is not for you. If you have a daily ride and want it to look respectable and last forever, this is it! I used the rattle can, but would look into the commercial spray in stuff. If you brought in a prepped frame I can't imagine it would cost as much as two part paint and powdercoat.
Fitz