Yes, plastidip is a pain in the ass to clean.
I have stock tires on stock plastidipped rims. I'm going to be changing the tries out this fall for winter tires. I will have to see how they hold up. I'm thinking the plastidip is going to get destroyed when i take the stock tires off and put the new winters on, and I have no idea how they will hold up in the winter. Guess we will see.
I think i'll run them like that this winter, and then maybe find a more permanent solution before winter 2013.