I see you're in SC. Sportsman's Warehouse in Columbia has powder paint, as well as the Bass Pro at Myrtle Beach and Charlotte. I'm sure there are more but those are the ones I'm familiar with.
I've used lacquer before. Dip it, flick it to get the excess off, let dry. A couple coats of white then your main color then some clear. Never tried fingernail polish to paint with but it works.
Even spray paint will work okay as long as you clear coat it. Not as good as powder paint, but if you don't have any other options...