G830 2.0 HVLP Gelcoat and Resin Touch-up Spray Gun This professional grade touch-up gun comes complete with a 2.0mm stainless steel nozzle, 0.12 liter cup and plastic material strainer. The 2.0mm nozzle is perfect for gel coat and resin. This gun excels at surface touch-ups such as mold repair, composite refinish and delicate boat hull repair. There are separate adjustments for spray pattern width and material volume. With gelcoat, you will need a 2.0 tip or bigger to be able to spray it.