I used Rustoleum Professional in spray cans available at Lowes or Home Depot, http://www.rustoleum.com/CBGProduct.asp?pid=95
I first sanded it down where needed, then used a scotchbrite pad to rough the entire surface. then i sprayed all areas that needed priming with Rustoleum Professional Primer. After it had dried i used the Proffessional enamel and put two good coats on it. It took about eight cans if i remember right not including two or three of primer.
After it dried there were rough areas from fogging because it got windy half way through the job so i used rubbing compound a week later to clean 'em up. If your good with a spray can you'll never know the diff.
I renovated the entire trailer, here's a few shots to show how it came out. BTW, i did it with the boat on trailer, not the easiest to do but it can be done.
(Message edited by razzman on October 03, 2007)