Epoxy provides a plastic layer to seal and protect the trailer from the elements. It also increases the depth and shine of the finish. The only problem is that epoxy takes a beating from UV damage so applying further protection from something like Marine Spar varnish afterward is required.
I used West system epoxy with the 207 clear hardener which has a very slight protection from UV, but not enough to go without the spar varnish. Other essentials include epoxy rollers and disposable pots for mixing the batches.
I made a logo on rice paper to show the build date and builder. I used rice paper which all but disappears underneath the layers of epoxy.
Laying the first layer of epoxy. I won’t get into all the details but the process involves rolling on a small area and then “tipping it off” with a cut section of foam roller to smooth it out. It is a slow and precise process, especially on a vertical surface. The other thing to note is the cleanliness of your area. Any dust you might disturb will end up in the epoxy and will ruin it. I took the afternoon before to thoroughly clean the garage.
The rice paper under the first epoxy layer.
I applied a total of 3 coats. Each was applied after the first one was tacky to the touch and ready to accept more epoxy. Applying the epoxy in this manner ensures that all the coats will be chemically bonded making the final result that much better. As it turns out by the time I finishing each coat the next was ready to be applied. 10 hours of laying epoxy later I was done! I took these pictures the next day.