I usually liberally coat my tires with Spray 9, let it soak for a few minutes, give a little scrub then spray them off with clean water and dry them before applying a tire finish. I've also used Fantastic. With both products you can see the dirt running off the tires as soon as you spray them. They seem really clean and kind of a flat black before the tire finish is applied. I'm not sure if these products actually attack the rubber so maybe I'm not doing the tires any favours. But, it seems to work great and I haven't noticed any 'damage' to the tires so far. I'd also appreciate any suggestions for cleaning products and suggestions for a couple, readily available, OTC really good long-lasting tire dressings - something that creates a satin finish - not glossy. I was detailing my car last weekend and my buddy gave me some tire gel to try out. To be honest, I didn't like it as it was thick and hard to get out of all the raised lettering etc on the tires. I did the best I could but after driving some of it splattered onto the quarter panels - quite messy after it collected a little road dust.
Thanks,
Adam