New Jersey, Omega's service center is in New Jersey. They will also polish the case and band in their full service price. I never had the stones to send my gens there however as I have read too many horror stories about their poor service.
I have THREE GEN Omega Seamasters, and the bands on all of them are very easy to scratch. As stated above, they are very easy to repair as well. A trick on the GEN Omega forums is to buy a green and yellow Scotch Brite pad and use the green abrasive side to "polish" the brushed steel look back into the band.