[Chris H]

Not a trailer, but when I built my shed for storing lawn mowers and such, I sealed the pressure treated plywood with "Kilz", then 2 coats of acrylic porrch and deck paint. That was over 10 years ago. With some leaking gasoline and motor oil, and who knows what else, it has held up very well. There are black tire marks, but no signs of peeling or lifting of the paint. Granted, it almost never sees any water, but would think the oil and gas would be harder on the finish. I would rather have used a good oil based deck paint, but it just isn't available around here.