I just wanted to give everyone a heads up on some stuff I found that seems to be working nicely for my sharp trailer corners.
2005 Fun Finder T139. Unless you buy a custom cover, all the generic covers are going to fit large on this baby because it's so small. I've tried everything to deal with sharp edges on my trailer but I live in AZ and the winds are brutal here. Tennis balls and pool noodles don't stay, the winds blow them off. I don't want to use tape because the heat melts the tape to the trailer surface.
I found this stuff on eBay and decided to give it a try for $14. It goes on easily and sticks well. Not necessarily pretty, but it comes in different colors and it's a 3M product. I decided in lieu of removing sticky tape from pool noodles taped to my trailer before I tow it, I might as well put this permanent stuff on and leave it.
Bumper Strip Surface Protector Corner Edge Cushion Guard 2meters with 3M Tape | eBay
Not sure how it will stand up in the heat (if it will get brittle and lose its squishiness), but I'll let you know after summer. But so far, it's pretty good stuff. It won't see sun unless I'm traveling so it should hold reasonably well.
I'm having a custom Sunbrella cover made and don't want this expensive cover tearing; if this stuff keeps its foamy/squishy consistency, it's going to be fantastic. Let me know if you try it and it works for you.