The only dent I am seeing is the one on the street side lower corner from behind, right? Well, you would probably have some luck sticking a suction cup or hot glue dent puller to it, and giving a yank. The dent might pop out, but you will still see a little bit of a wrinkle where the dent had been. If it is anything like the dent I had in my trailer, a slight pressure will make it pop back in again, so you will need to keep that suction cup handy. The only way you are going to get this to look perfect again is with a panel replacement.
The sad reality is that clear coat peels, and the older the trailer gets, the more it is going to peel. It's not a defect specific to your trailer, just something that will inevitably happen to all clear coated trailers. As a 1990 model, this trailer is nearly 25 years old. It almost qualifies as vintage, so if peeling clear coat is the worst you have to deal with, then you aren't in bad shape.