Septone Enamel Primer is suitable for use directly onto ferrous metal, fibreglass and timber substrates. It exhibits fast drying and rust resistant qualities with superb build and sanding properties. It has excellent adhesion, with outstanding hold out, and is suitable for use as a base for all enamel topcoats. Note: use Septone Acrylic Primer Surfacer or Acrylic Primer Filler for priming under acrylic finishes and lacquers.