You decide whats cheaper,I just painted a set of tins for a buddys victory motorcycle and spent over $200 just in primer,paint,reducer,and catalyst.Thats not including sanpaper,tape,prep time etc. I would just powder coat it if you want it to last for awhile.You can also save yourself some money and sandblast it yourself or send it out to be sandblasted.Hell you can sand it by hand if you want.The less prep work for the pc'r the less it is for you.