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What should be done before applying colored coats over white dope?. Let it dry for at least 48 hours. Apply clear dope. Apply another coat of white dope. Follow the manufacturer's instructions.

What problem can occur if there is too much aluminum pigment in the fill coats of dope?. Blushing. Pinholes. Poor adhesion. Peeling off.

How can blushing be prevented?. By increasing humidity. By mixing more thinner with the dope. By heating the air in the spray booth. By using a faster-evaporating thinner.

What should be done if blushing occurs after spraying dope?. Sand the surface. Apply more dope. Apply a mist coat of retarder and thinner. Let it dry naturally.

What causes pinholes in the dope finish?. Excessive atomizing air. Lack of aluminum pigment. Insufficient drying time. Excessive humidity.

What is the function of retarder in dope thinner?. To speed up evaporation. To increase adhesion. To prevent blushing. To cause pinholes.

How does excessive atomizing air on the spray gun contribute to pinholes?. It prevents the dope from drying. It slows down evaporation. It adds more solvent to the mixture. It forces air into the dope film.

What problem does blushing cause in dope finishes?. Poor adhesion. Pinholes. Chalky appearance. Peeling off.

How should blushing be addressed if it occurs after spraying dope?. Sand the surface and reapply the finish. Apply more retarder. Apply more thinner. Heat the surface.

What is the purpose of applying retarder instead of thinner to prevent blushing?. To speed up drying. To increase humidity. To slow down evaporation. To remove blushing.