Demonstrate measuring thinners, reducers and hardeners. 25.7 To thin primer to the correct viscosity for spraying and to add the appropriate amount of hardener to the primer. Temperatures may vary with different manufacturers . Temperature is important as it affects how the paint atomizes and how it spreads on the surface being painted. All paints must be strained before being put through the paint gun.
Notes Demonstrate the use of ratios to reduce paints.
Refer to manufacturer s information sheets for recommended ratios for the product being used. 25.9 To identify the pot life of paint or primer. Acrylic enamel has a pot life of 3 to 8 hours. High solid primer has a pot life of about 3 hours. As soon as a student is finished applying a product, the gun should be thoroughly cleaned with a solvent inside and out.