15 years ago I had a white convertible. Someone slashed the top to get inside. The repair shop told me it would cost almost $600 for a new one - couldn't repair that one. I took an upholstery needle and dental floss and did a buttonhole stitch around the edges of the cut. Then I whip stitched the buttonhole threads together (I didn't want to have the stitches pulling through the fabric). Then I got some exterior caulking (clear) and put a thick coat of it on the embroidered area. That top survived a Missouri blizzard and two California summers - including another slash job that I fixed the same way.