3M General Purpose Body Filler is a smooth, midweight, general purpose body filler for a wide range of applications and temperatures. It’s easy to apply and spread, cures fast and is easy to sand.For an easy application and spread, use the 3M General Purpose Body Filler. This light coloured, smooth general purpose body filler has excellent adhesion to steel, galvanised metal and aluminium. General Purpose Body Filler works well with all mainstream paint systems. It cures fast and is easy to sand, giving a smooth surface to work on.