sand-free primer the secret weapon pros use to make interior dye really stick ... primer to chemically bond dye to panel proper prep makes the difference zsf-311 mg-98 ... the parts of dirt interior conditioning products that others may have applied and the ... sand the surface to be dyed in order to promote adhesion fine sandpaper such as #400 ... primer before spraying the dye besides promoting adhesion this will lessen the ... coats that are wet enough to flow into each other but not so wet as to ...