I've been having a little problem. I have my set of stock base 5th gen prelude wheels that I'm cleaning up to resell. I was told the easiest way to do this was to buy some aircraft remover, spray them, then rub it all off. So I tried that but it only worked on two wheels. On the other two wheels, the remover took off the top layer but the second layer wouldn't come off. These wheels were painted black, then repainted silver.

Does anyone know of a chemical that could take off powdercoating? I think that might be what the previous owner did, but I don't know why he would only do 2....

Can anyone help me out?