First question is more concerning tire appearence, is it okay to use products such as "Armor All" or "tire shine" on the sidewalls of these tires to make them look good? I don't want to put anything on the tire that will destroy it prematurely or degrade it's traction properties. What do you guys use? Also, is there anything that should be done to the tires (particularly the tread surface) after a day or weekend at the track? I've heard the tread suface should be cleaned and even "scuffed up" after, to get the traction compounds they put down at the track off of the tire before they "set up" or glaze over. Saw this on another site and a guy even had a procedure he follows for this. 1st time I'd heard of it, wondered if it's just B.S. Any other tips on tire care are welcomed as well. Thanks.