Clear Multipurpose Rubber Coating on Pliers and gloves.  (Can shown - see Hot-Melt link for the round and square objects) 
I dipped a pair of pliers into some 1.5 Ounce, Clear Multipurpose Solvent-Based Rubber Coating (Same as 9560T7)
      9560T77    $7.94 Each.  It is difficult to see the coating on the pliers.  I also applied some to a pair of cotton gloves to create "grip-gloves" and that seemed to work pretty well.
--Tom Owens, Dec. 11, 2005