Norrie:

Don't waste the money on a new rim, especially when you would need two in case you damaged the 19" or the 18" ones.
I just had all 4 of mine redone in Winnipeg for $400 total and they look just like new. They rewelded the rims, refinished, repainted and balanced them.
I admit that the price is good as I know the owner, but they did come out perfect. Just make sure that the company doing them know to drop the wheel sensors into the tire before taking the tire off.
If your thinking of a set of spare rims that you can drive on while you wait for the refinishing, then that is a different matter. It takes about a week if you let them dry a bit better before reinstalling.