Is it possible to repair damage to the non-stick surface?
no you cannot practically repair teflon damage. In theory you could probably spray more teflon over it, but you would likely want an even coating, which would mean stripping the pan anyway. Plus, the teflon would be very hard to get a hold of, you'd need spraying equipment, and then a curing oven to bake it at something like 400°C.
Personally I don't recommend spending a ton of money on frying pans. The expensive pans don't really offer anything worthwhile over cheaper pans. You can get tri-ply teflon (brand) pans from ikea for $30-40. if you want high heat cooking I'd recommend stainles/carbon steel or cast iron