POR 15 is good stuff!!! I have a trailer that I painted with it a few weeks back. I went over the thing with a wire brush attachment on a grinder. Then I sprayed it on with a 10 dollar spray gun from the great harbor freight . I sprayed the bottom to get a lot of coverage real quick . I brushed the top of the trailer and it came out very glossy looks great to bad I will have to paint it again with regular paint to cover where the sun will hit. With this stuff you can have it glossy, semi gloss, or flat depending on how you apply.