The answer to your question comes with many options as there are boaters it seems. I too refurbished a trailer and I used total PPG paints which are the same paints body shops use for auto repairs. But it works great and is a tuff finish impervious to oils, gas, or chemicals of most any type. I used PPG primer and then color coat, stripping and top coats of clear to give it that nice shiny look. You can look at my results from the link below and see how that worked out. But honestly, there are so many quality finishes out there that it is hard to tell if one is much better then another. The only thing I can testify too is your finish is directly proportional to the amount of prep work you give it. Do the prep work great and the finish will look and last for a long time. If you can feel or see any imperfections in the primer coat, it will show in the finish coat for certain! JMHO!