I use liquid tire buffer and wd40. I first wipe the tires with the liquid tire buffer, was told it opens the pores in the rubber, then I apply the wd40, which softens and condtions the rubber, or so I've been told. I use a separate rag to apply each. I then heat the tires with my MuchMore tire warmer.
TRex chassis with McAllister Xfinity Ford Mustang
Member of WRCRC
Authorized HobbyWing, Gens Ace batteries, McAllister Racing Bodies, and Precision Racing Systems dealer: BroeckerRacing@Gmail.com