To spray Motor Coater, thin it 5–10% 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/pot guns, or 25–35 psi for gravity/top-feed guns.
Motor Coater Spray Gun Settings
| Gun Type | Recommended PSI | Metric (kPa) |
|---|---|---|
| Siphon / Pot Gun | 35–45 psi | 250–330 kPa |
| Gravity / Top-Feed Gun | 25–35 psi | 170–250 kPa |
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 full spray & application directions for Motor Coater —
including surface prep, coat counts, recoat windows, and cure times.
Motor Coater Full Application Guide →
Motor Coater Full Application Guide →
Frequently Asked Questions — Spraying Motor Coater
A reduction of 5–10% is normally adequate. Measure by volume —
for example, add roughly 1 oz of thinner per 10–20 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 specifically 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?
Our technical team is ready to help.
Contact KBS Technical Support
Contact KBS Technical Support
