1k Nitro putty
A quick fix for micro-pinholes that are hard to identify prior to primer application. This 1K patent-pending technology is a high-solids polyester that is easy to apply and quick to dry. Testing has shown, when used properly, 440Express will eliminate up to 90% of all rework caused by micro-pinholes.
Permacron 7715 – one pack acrylic putty that spreads very easily and pore-free, and after a short drying time, can be very easily sanded. It has a neutral light beige color and is suitable for touching up prepared substrates. Can be applied to bare sheet metal.