I asked the same question to 5 other owners who do the same thing. They all said as long as you keep it clean it will wear slowly. Of course, eventually they will need to be redone but to keep them looking this way to just keep them clean. With our agreement (we've been bartering along the way), it's only $20-25/each wheel. I thought what the hell, do it since I'm replacing them anyways.
To me it's an experiment I guess.