But, honestly man, it sounds like you're just being a bit of an overly protective parent who's freaking out that lil' Billy skinned his knee. It's probably fine...particularly if they're park skis. If it's a sizable gouge, just drip some ptex in there, while the skis are inside and room temp, let it stand for a day or so, lightly scrape/(sand if necessary) it flush, and wax. But like I said, I have a feeling that if you were to just wax, it'd be fine. The best way to answer this question is to simply put the ski on snow. Does it ride differently? If not, forget about it.
I'd only spend the money at a shop if it were a serious gouge that ran perpendicular to the running length, or if it's a big gnarly core shot.
Having fun at skiing's expense since '09.