I put a small bead of 7min epoxy right on the monocoat along the edge of the underside and it works great. My Ultimate bipe has a very low bottom wing and I was always scraping the covering off on our paved runway. When the runway runs north south and the wind doesn't you can't help but scrape the odd tip. The epoxy is cheap, dries clear and works great. Let it set up for a bit before you put in on and it wont run.