When spraying Motor Coater, spray pressures of 35-45 psi (250-330kpa) for siphon/pot guns and 25-35psi (170-250kpa) for gravity/top container guns are recommended. Thinning of 5-10% is normally adequate and use KBS #1 Thinner or Xylene only which are designed to be slower evaporating solvents which work extremely well with Motor Coater.
Please check out the complete Motor Coater Application Directions before you begin your project.