What contaminants must be cleaned from wood before applying a finish with a rag?

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Get ready for the CCQ Painter Trade Qualification. Study with multiple choice questions, flashcards, and gain insights on what to expect on the test, with hints and explanations for each question.

Multiple Choice

What contaminants must be cleaned from wood before applying a finish with a rag?

Explanation:
Cleanliness of the surface is crucial when applying a wipe-on finish. Both dust and grease must be removed so the finish can wet the wood properly and form a smooth, even film. Dust left on the surface can get trapped in the film, creating specks and a rough texture, while grease or oils from hands or the wood itself can prevent the finish from bonding, leading to poor adhesion, blotching, or fisheyes. Therefore, thoroughly removing all dust and grease before wiping on the finish gives the best, most uniform results.

Cleanliness of the surface is crucial when applying a wipe-on finish. Both dust and grease must be removed so the finish can wet the wood properly and form a smooth, even film. Dust left on the surface can get trapped in the film, creating specks and a rough texture, while grease or oils from hands or the wood itself can prevent the finish from bonding, leading to poor adhesion, blotching, or fisheyes. Therefore, thoroughly removing all dust and grease before wiping on the finish gives the best, most uniform results.

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