I've decided to attack my dad's N reg A4 and I thought I'd start with the wheels. I dont think these wheels have EVER been cleaned on the inside as there was a good layer of sh!t on the inside! After a LOT of elbow grease, the inside is about as clean as I can get it. Nice and silver again! On the outside however, theres a lot of tar spots that not even a good dose of Tardis will get rid of! Now I've got an aggressive clay bar on its way. Will this do or will I need anything else? I'm beginning to think that these wont come off at all!