Just ordered new tires for one of my cars and was talking with the tire guy about the condition of the tires because I have a lot of tread left but cracking on the sidewalls, etc. He said the tire shine products cause the cracking and that Armorall was really bad for tires. In subsequent research I have come across 303 Aerospace Protectant. Anyone know anything about this product? Does it protect as opposed to ruin your tires? All feedback would be appreciated.