This prep is wiped during the week for conditioning and at the track accordingly. treatments. Racing surfaces vary not only from track to track, but during a nights racing at the same track. The rubbing of all the edges helps a tire heat up, but the cuts also help cool a tire when youre coasting under a yellow, which reduces blistering problems. Come join the discussion about die cast, models, slot cars, radio control vehicles, classifieds, swaps, and more! Once you learn enough you can mix the available preps to make your own, but I would start with the ones available at most kart stores. // -->