1K High Build Primer Spray Paint (3 Pack) - 12 Oz Grey - Automotive Sandable Primer for Metal, Plastic, Fiberglass - Direct to Metal - Easy Sanding for Auto Paint12 ounce Spray Can provides a High Build Primer Surfacer that is a flexible acrylic surfacer for priming steel, aluminum, fiberglass, SMC, and urethane painted surfaces in an Easy to use aerosol spray can. Provides superior adhesion, Excellent filling properties, Works on flexible or rigid substrates Easy to sand, Topcoat with most Automotive Paint refinish topcoats Flat fan high atomization nozzle offers a large fan pattern and excellent coverage