To spray Motor Coater with a spray gun, thin it 5 to 10 percent using only KBS #1 Thinner or xylene, slow-evaporating solvents that allow proper flow-out for a smooth finish. Set your spray gun to 35-45 psi for siphon or pot guns, or 25-35 psi for gravity or top-feed guns.
Approved thinners: Use only KBS #1 Thinner or xylene. These slower-evaporating solvents give Motor Coater the time it needs to level and flow out properly. Fast-evaporating solvents such as lacquer thinner or acetone will cause blushing, fisheye, and poor adhesion. Do not substitute.
View the full Motor Coater Application Directions for surface prep, coat counts, recoat windows, and cure times.
Frequently Asked Questions: Spraying Motor Coater
A reduction of 5 to 10 percent is normally adequate. Measure by volume, for example add roughly 1 oz of thinner per 10 to 20 oz of Motor Coater. Over-thinning reduces film build and durability, so stay within this range.
Use only KBS #1 Thinner or xylene. Both are slower-evaporating solvents matched to Motor Coater's chemistry, allowing the coating to level and flow out before the film sets.
Set a siphon or pot gun to 35-45 psi (250-330 kPa). Start at the lower end and adjust up if you see orange-peel texture or poor atomization. Higher pressure in siphon guns compensates for the longer paint column lifting from the cup below.
Set a gravity or top-feed gun to 25-35 psi (170-250 kPa). Gravity-feed guns require less pressure because paint feeds naturally from the cup above. Staying in the lower range prevents over-atomization and wasted material.
No. Fast-evaporating solvents like lacquer thinner, acetone, or mineral spirits will cause the coating to dry before it can flow out, resulting in blushing, fisheye, and compromised adhesion. Always use KBS #1 Thinner or xylene only.
Still have questions about spraying Motor Coater? Contact us for help.
