Berryman's B-12 Chemtool has been widely acclaimed to work in areas which have absolutely nothing to do with carburetor or choke cleaning. Many of our customers use the B-12 to clean gun parts, small metal gears, and mechanical assemblies of all types. Due to the chemical properties of this product, which include fast evaporation, no lingering residue, and no color of its own, it has been a product of choice for many to clean parts prior to painting or coating. We do not recommend this product for cleaning of rubber or plastic parts. Any non-metal cleaning needs should be tested prior to actual cleaning to check for compatibility.