Rustoleum or brightside?

Either way, they are similar in application. Thin brightside with either their thinner, or mineral spirits. The ratio I'm going to use next is 15% thinned, since 10% sprayed levels out OK when sprayed in correct amounts. Then roll on.

Wetsand after each coat to get rid of orange peel and imperfections, with 800 grit. Last coat, let it set for a few weeks, then hit with 2000 grit wet, then polish and wax.

That's the basic recipe. The best thing to do is to buy the materials (fine foam rollers from home depot or lowes, in a 5 pack for about $6) and do a test piece. It's a pretty easy thing to do with a roller.

The worst thing you can do is waste paint. If anything goes terribly wrong you can just wetsand it down and paint again. Unless you're slathering the paint on too thick, you shouldn't get any runs or anything that would require the whole thing to be sanded off.