You've done yourself proud there mate
, nice one I'm glad its taking shape and your happy with it. Nice job with the polishing its looking great. On a side note is it any good the rivet gun you got from ebay?, I'm thinking of getting one myself for a project I'm working on. If the 1200 grit is scratching the surface then try 2000 grit, i think that is the lowest, also the guy in that link i put up used baby oil with the wet & dry i bet that is to stop it scratching the finish.
Mark

Mark