Jess,
Over the last few days I've read through your thread here. Very nice job. Like others here I applaud your efforts, documentation, and design. I dig the look of this thing. Well done. Additionally, as a professional woodworker I will also comment on your newly refined skills. You have embarked on what has been a lifelong journey of mine discovering daily the science of structure craft. This has truely been an entertaining read. We have not only gotten to experience your trailer build, but your struggles, your relationships, and your recoveries. So thanks for that, its been worth the time for sure.
Given my regular use of CPES in my business (we build alot of custom doors and use it as part of our *boat varnish* prefinishing system), I know Steve at Smith Co, the mad scientist behind CPES. He also makes a filler product that accompanies the CPES called Restore-it. I recommend that product for repairing the holes in your skin, its like a bondo, but it bonds with the CPES on a molecular level, much like the CPES bonds into the fibers of the wood. Additionally, when using CPES, it's more advantages to *feed* the CPES to the wood in one coat rather than use numerous coats. The reason behind that is that after the first coat, the wood becomes sealed and additional coats will not penitrate the first. Therefore, it is more effective to flood the wood slowly letting it absorb as much of the CPES as it can possibly accept in the single application literally until the wood will no longer absorb any more. That allows for maximum penitration into the material. Then within 24 hours begin your top coat application. This continues the molecular bond of the topcoat to the wood fiber via the CPES. Steves instructions are a bit hard to follow I know, he's just a bit too smart for the rest of us. But I have had great success with the longevity of finishes by maintaining that molecular chain. Also, look into Epifans topcoats, they are boat finishing products from Holland. Very expensive, but well worth the cost in longevity. Thanks again. Carry On!