Do you have a pic of how your frame came out?
You can get very good results with the rattle can.
I rattled can my frame the eastwoods high dollar stuff.I didnt think it was worth the money,
I got very good results with a cheap H.F. HPLV gun, sprayed using a pancake aircompressor. I used Rustoleum satin in the quart can and thinned it down.
Good Luck.