CDA Case Analysis & Practical Application 2 — Questions and Answers
Question 1: A client requests a faux marble finish on a bathroom vanity that will be exposed to moisture daily. Which preparation step is most critical before applying the decorative finish?
- Apply the marble glaze directly over the existing paint
- Prime the surface with a moisture-resistant primer (Correct answer)
- Sand lightly and apply the finish without priming
- Use a water-based topcoat as both primer and finish
Correct answer: Prime the surface with a moisture-resistant primer
A moisture-resistant primer seals the surface and prevents adhesion failure in high-humidity environments.
Question 2: When analyzing a client's space before applying a Venetian plaster finish, you notice the existing wall has hairline cracks. What is the correct course of action?
- Apply Venetian plaster over cracks since it is thick enough to fill them
- Fill and sand all cracks before applying any base coat (Correct answer)
- Use a flexible sealant over cracks and begin plastering immediately
- Ignore hairline cracks as they are cosmetically insignificant
Correct answer: Fill and sand all cracks before applying any base coat
Filling and sanding cracks ensures a smooth substrate, preventing the cracks from telegraphing through the finished plaster layers.
Question 3: A client shows you a photo of a linen-effect wall finish they love. After case analysis, you determine the room has heavy foot traffic near the walls. Which topcoat choice is most appropriate?
- No topcoat is needed since linen finishes are naturally durable
- A matte wax finish only, as gloss would alter the texture appearance
- A water-based polyurethane topcoat rated for high-wear areas (Correct answer)
- A single coat of flat latex paint as a sealant
Correct answer: A water-based polyurethane topcoat rated for high-wear areas
A water-based polyurethane rated for high-wear areas provides the durability needed in high-traffic zones without significantly altering the linen texture.
Question 4: You are applying a color-wash technique over a large accent wall. Midway through, you notice the wet glaze is drying faster than expected due to warm room temperature. What should you do?
- Continue applying glaze and blend quickly to avoid lap marks
- Stop, let the wall dry fully, and restart from the beginning
- Add water extender or a glaze medium to slow drying time and work in smaller sections (Correct answer)
- Apply a second coat of glaze over the dried sections immediately
Correct answer: Add water extender or a glaze medium to slow drying time and work in smaller sections
Adding a glaze extender and working in smaller sections prevents lap marks caused by fast-drying glaze in warm conditions.
Question 5: A residential client wants metallic paint applied to kitchen cabinets. During your practical assessment, you identify the cabinets have an oil-based factory finish. What step is essential?
- Degloss with liquid deglosser and apply a bonding primer before the metallic finish (Correct answer)
- Apply the metallic paint directly as it adheres to all surfaces
- Use only water-based metallic over oil-based finishes without priming
- Strip the factory finish completely with chemical stripper before proceeding
Correct answer: Degloss with liquid deglosser and apply a bonding primer before the metallic finish
Deglossing and applying a bonding primer are essential steps for new paint to adhere properly over a slick oil-based factory finish.
Question 6: A client requests a distressed, aged-plaster look for a new construction living room. During case analysis, you note the walls are freshly skimmed drywall. Which approach best achieves authenticity?
- Apply one thick coat of joint compound, then sand unevenly to simulate age
- Use a multi-layer technique with varied tints of plaster and selective sanding to reveal underlayers (Correct answer)
- Paint the wall gray and apply a crackle medium over one coat
- Stipple a single layer of beige latex paint while wet
Correct answer: Use a multi-layer technique with varied tints of plaster and selective sanding to reveal underlayers
Multi-layer plaster application with varied tints and selective sanding mimics the authentic depth and patina of aged plaster.
Question 7: After completing a decorative faux finish on exterior shutters, the client reports peeling within three months. When analyzing the failure, which root cause is most likely?
- The decorative glaze color was too dark for exterior use
- The substrate was not properly cleaned and primed with an exterior-grade primer (Correct answer)
- The wrong brush type was used for the initial application
- The finish was applied during ideal weather conditions
Correct answer: The substrate was not properly cleaned and primed with an exterior-grade primer
Inadequate surface cleaning and failure to use an exterior-grade primer are the most common causes of premature peeling on exterior applications.
CDA Case Analysis & Practical Application 2
A client requests a faux marble finish on a bathroom vanity that will be exposed to moisture daily.
Which preparation step is most critical before applying the decorative finish?