Joe,
I don't think you will have a problem buffing, but I know the non-skid texture they molded into the deck is not conducive to sanding.
Good luck, I hope it turns out.
on a side note, I just remembered this morning that I had one more repair to do on mine before heading up north Friday. Not a real big deal, I just have to replace the nuts and bolts on the center boards wood trim or handle if you will. The previous owner put a new wood piece on, but did not use locknuts or lock washers. All, but two off the nuts worked their way off and have been lost. I'm going to the store to get nylon lock nuts this afternoon.
A future project for me is to figure out a system to adjust the height of the center board to keep it up when I am in shallow water or beaching it. Here's what I'm thinking and let me know if you think this will work.
My center board is aluminum and I was thinking about drilling several holes in it at various vertical depths that I could insert a half inch diameter pin through to rest on the top of the trunk. See diagram below (not drawn to scale).
