I had that exact situation happen. I spoke to the lads at Schwab, and Discount, and they all agreed, the powder coat holds up best to the de-ice solution they use on the roads.
I had my wheels sandblasted. I told them they were going to be powdercoated, so they knew how much to blast off, and then took them to a powder coat shop. I'm fortunate that my neighbor runs a powder coat shop, and they just got their own blast shop open. I can refer you if you PM me. They did a GREAT job. I wanted black, and he recommended a 60% gloss, as its the toughest of all the gloss levels. So far, very very happy.