Teardrops n Tiny Travel Trailers

What is every one using for their roof molding that covers the roof to the plywood side? I have seen some of the aluminum stuff that the teardrop fix-it-shop has but are there any alternitives? Or is there any way that I can create a eyepleasing edge without aluminum? My sides are varnished 3/4" birch ply and the roof is 1/8" birch ply that will be painted.

I'm using a garage door seal.

That probably won't look very good on a wooden teardrop, but it should look nice on my fiberglass one.

Steve