I was thinking about Mike’s weekender and a few of my own squared off designs, and thought myself "Self, wouldn't it be neat if we could have smooth rounded corners without having to use a router"
Surprisingly, I answered yes! Then I remembered something I saw in my house last week right after they finished hanging the drywall. It is called a Bullnose Finishing Strip. It is how they give you those nice rounded corner on your walls and windows in new homes. You could use a couple of those strips on the front of a trailer to smooth it up and give yourself a really polished look!