Hi Suzyann,
Congratulations on your engagement.
I have a platinum band for four years and even though its scratched a bit, a quick buff and polish brings it back to its original shine. My hubbys ring is also platinum and it is scratched, and has dulled completely. I think a lot of it is that the ring will be on you all of the time, it is bound to get wear and tear, for me, it only adds to the beauty of it.
How about going for a white gold wedding band for hubby to be?