Replying to Base repair: any ski goo Roos out there?

I'm into my third season of maintenance on my own . I have much fun in doing so . Bit I've reached a problem . I have some base repair needed , it's right along the metal edge . Tepair area is about 2 inches long, and 3/16" wide. I've done p tex on it once and it's eroding out, I had the shop do it once and it's eroded out too. I know it's difficult to bond ptex at the edge... Should I ptex again , it pills out after 2 days on hill. Or should I fill gap with epoxy and shave it smooth? These are on my old boards, I them use for groomers and minor park in the Midwest . So I'm not afraid to experiment with them. It's no loss to me of their or repairable after a few try's . Any help thanks !