By far the most widely used primer in the sign industry today is
Grip-Gard Wash Primer. A great multi-use primer, it provides the type of protection against rust and corrosion needed to guarantee your signage will look great for years to come.
Grip-Gard Wash Primer is a two part self -etching primer used primarily for sign frames & cabinets and demonstrates excellent adhesion to aluminum and steel as well as many other types of metal substrates. Wash Primer is also suitable for many wood composites and for most existing paint finishes.
Recommended substrates:
Aluminum / Steel
Galvanized / Wood
Most existing Paint Finishes