CD Machine Polishing & Compound Selection 2 — Questions and Answers
Question 1: When using a dual-action (DA) polisher on a soft paint system, which pad type minimizes the risk of burning through?
- Wool cutting pad
- Foam finishing pad (Correct answer)
- Microfiber cutting pad
- Heavy-cut foam pad
Correct answer: Foam finishing pad
A foam finishing pad on a DA polisher generates less heat and aggression, making it safer on soft or thin paint systems.
Question 2: What is the primary purpose of a 'finishing polish' in a multi-stage paint correction process?
- Remove deep scratches
- Cut through clear coat oxidation
- Refine the surface and remove light haze left by cutting compounds (Correct answer)
- Apply a protective sealant layer
Correct answer: Refine the surface and remove light haze left by cutting compounds
A finishing polish is designed to remove micro-marring and haze left by more aggressive compounds or polishes, leaving a refined, high-gloss surface.
Question 3: Which machine polisher type produces a true random orbital motion, making it the safest choice for beginners?
- Rotary polisher
- Forced-rotation dual-action polisher
- Free-spinning dual-action (DA) polisher (Correct answer)
- Long-throw DA polisher
Correct answer: Free-spinning dual-action (DA) polisher
A free-spinning DA polisher stops rotating when excessive pressure is applied, greatly reducing the risk of heat buildup and paint damage.
Question 4: A detailer notices swirl marks remaining after using a medium-cut compound with a foam pad. The BEST next step is to:
- Increase machine speed only
- Switch to a wool pad with the same compound
- Step up to a more aggressive compound and cutting pad combination (Correct answer)
- Apply wax over the swirl marks
Correct answer: Step up to a more aggressive compound and cutting pad combination
If the current combination is insufficient to remove defects, increasing cutting power through a more aggressive compound and pad pairing is the correct approach.
Question 5: What does 'diminishing abrasive technology' (DAT) mean in modern polishing compounds?
- The compound becomes more aggressive as it dries
- Abrasive particles break down into finer particles as they work, transitioning from cut to finish (Correct answer)
- The compound loses all abrasive properties immediately upon application
- Abrasives are reduced in concentration over time in the bottle
Correct answer: Abrasive particles break down into finer particles as they work, transitioning from cut to finish
DAT compounds start with larger abrasive particles that fracture and diminish in size during polishing, allowing a single product to cut and then finish.
Question 6: When polishing near edges and body lines, the detailer should primarily:
- Increase machine speed for better control
- Use heavier pressure to ensure even coverage
- Reduce pressure and use minimal product to avoid strike-through (Correct answer)
- Apply compound with a hand applicator instead
Correct answer: Reduce pressure and use minimal product to avoid strike-through
Edges and body lines have thin paint and are prone to strike-through, so reduced pressure and minimal product protect against burning through the clear coat.
Question 7: Which of the following best describes 'hazing' after machine polishing?
- A deep scratch visible under direct light
- A milky or dull film remaining on the paint surface after polishing (Correct answer)
- Water spots caused by improper rinsing
- Orange peel texture in the clear coat
Correct answer: A milky or dull film remaining on the paint surface after polishing
Hazing is a fine, dull film or micro-marring left on paint after using a cutting compound, which must be removed with a finishing polish.
CD Machine Polishing & Compound Selection 2
When using a dual-action (DA) polisher on a soft paint system, which pad type minimizes the risk of burning through?