Originally Posted by motobando
re-glossing it - that's what I was hoping for. Was thinking there's maybe a way to somehow buff it out with some elbow grease...
Not really. If it were a hard boat you could try progressively finer polish, working up to something like 1200 grit wet sanding. Then of course you'd wax it to "fill in" the last imperfections for a gloss finish.
I don't think I would try that on hypalon. Waxes are generally bad news for inflatables, limiting your future repair options. 303 Protectant might help a little. It will mostly be slippery and a bit glossier, but won't really remove the underlying scratches and needs to be reapplied.
Being in San diego sun you'll want 303 anyway to keep the fabric aging to a minimum. Might as well see if it helps the scratched areas.