If it's a really big scratch I'd start with at least 240 grit paper and do a wide area around the scratch so it doesn't get a pronounced depression. In fact, given that the Goddards are so flat, just about any work like that is going to show up unless you resand the whole side on a good, flat surface. After 240 go to 400 grit, then 600 grit and buff with a compound like White Diamond. At each step, be thorough; micarta's really hard compared to stuff like dymondwood and I've had almost no luck buffing out scratches that the previous sanding steps didn't catch.
I wonder if Spyderco's repair department would take care of something like this?
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-Corduroy
(Why else would a bear want a pocket?)