NP-790 UNIVERSAL POLYESTER PUTTY - is a premium multifunctional polyester filler with exceptional filling ability and excellent sanding properties. Designed to effortlessly smooth out small, medium, and large irregularities on various surfaces, including: aluminum, stainless steel, galvanized steel, bare steel, wood and polyester surfaces.  The smooth texture of NP-790 guarantees superb processing qualities, including easy application, quick drying time, poreless finish, precise shape retention and seamless processing. It holds its shape well, making it easy to process without clogging the abrasive in both manual and mechanical grinding processes.