armorall is crap! for leather i use Griot's LeatherCare Spray and their LeatherCare cream. the spray is especially a great tool to have, just spray into a MF applicator/utility towel and wipe your steering wheel clean. for plastic surfaces i use Prima Nero (available at amazon) or recommend Aerospace303. but Nero is more matte.
Car Care, Detail Supplies, Garage Organization, Car Accessories - Griot's Garage 800-345-5789