I saw this product at Rural King, similar to Tractor Supply but bigger and better. Not sure exactly how this would work but figured I'd post it. Might be a good choice for 4x4 tires.
Majic 8-0018-3 Ready To Apply Tire Paint, 16 Oz
– Toolbox Supply
Majic 8-0018-3 Ready To Apply Tire Paint, 16 Oz
– Toolbox Supply