I had damaged the fabric of the left gear leg when I was installing the wing strut, tearing the fabric in two places. Using the procedures outlined in the Poly-Fiber manual, I masked out the specified region using electrician's tape. It turns out that taping the border isn't such a good idea as it leaves a line that will need to blended in later. Anyway, I patched the defects, Poly-Brushed them, used an iron with parchment paper to blend the tape lines, and sprayed them with Poly-Spray using an airbrush.
