Having both raced wheel to wheel and autocrossed in the rain, I can tell you one thing. The years I spent travelling from So. MA to northern NH in ice, rain, sleet, and snow and also practicing car control in empty parking lots for such travel as a young teen, I can tell you, I wished I had ice racing experience to add to that learning of car control. Racing in the rain is, yes, an entirely new ball game when it comes to racing, but I must agree with both R & S.....track time, be in on ice, rain, or even a slushy parking lot, teaches you much. I saw what those two learned in the rain at LRP. I can attest to the fact that they used that rainy test day to learn anything and everything they could about dry lines, wet lines, and tires. I recall going out for a practice session in the 88 NARRC runoffs in my sport 2000 on slicks just to see what the car would do. It was the most valuable 5 laps I ever took in my short racing career. I learned a ton.