Of all the multi-purpose products out there, I can think of only three that I would wholeheartedly recommend. Leatherman multi-tools, GT85 cleaner and lube, and now 303 Aerospace Protectant. Before we go into the details, I would like to cover a few of the high points. First this is not a petroleum based product, so over spray is easy to clean off. Second, it is a rubber protectant not a rubber shiner like Tire Wet. Finally best of all, this can be used on composite materials that do not have properly stabilized resins to prevent UV and Ozone oxidation. Keep in mind no product can truly restore a tire. Once it has cracked it is cracked. The key is protecting them and preventing future damage. 303 is considered by many users to be one of the best, despite being an obscure name in the car world. It has been used extensively on heavy trucks, RVs, and aircraft and is a highly regarded product in these communities. Finding it locally can be a challenge. West Marine carries it at selected locations. The best price that I could currently find was on Amazon: 303 Aerospace Protectant.