CD Polisher & Extractor Equipment 3 — Questions and Answers
Question 1: When a rotary polisher creates 'holograms' or 'buffer trails' on dark paint, what is the most likely cause?
- Using too slow a rotation speed
- Finishing with a heavy cutting pad and compound without a finishing step (Correct answer)
- Applying too little product to the pad
- Using a pad that is too large for the panel
Correct answer: Finishing with a heavy cutting pad and compound without a finishing step
Holograms are micro-scratches left by aggressive pads/compounds that must be refined with a finishing polish and softer pad.
Question 2: What is the recommended water temperature range for a hot water extractor when cleaning automotive carpets?
- 80–100°F
- 120–140°F
- 150–200°F (Correct answer)
- 212–230°F
Correct answer: 150–200°F
150–200°F is effective for breaking down soils and sanitizing without damaging carpet fibers or adhesives.
Question 3: A polishing pad with a closed-cell foam construction is best suited for which task?
- Heavy compound cutting on oxidized paint
- Applying wax or sealant as a finishing step (Correct answer)
- Removing deep scratches from door panels
- Wet sanding residue removal
Correct answer: Applying wax or sealant as a finishing step
Closed-cell foam is dense and non-abrasive, making it ideal for applying and leveling wax or sealant without marring.
Question 4: What does 'RPM' measure on a rotary polisher, and why does it matter for paint correction?
- Revolutions per minute; higher RPM increases friction and heat generation (Correct answer)
- Resistance per motor; higher values indicate stronger motors
- Random pad movement; more movement means less surface contact
- Rotational pad mass; heavier pads need more RPM to spin
Correct answer: Revolutions per minute; higher RPM increases friction and heat generation
RPM measures how fast the pad spins, and higher RPM increases cutting aggressiveness and heat — requiring careful control.
Question 5: Which extractor accessory is specifically designed to clean and extract moisture from automotive seats and tight crevices?
- Wide-mouth floor tool
- Detail upholstery tool with narrow slot nozzle (Correct answer)
- Carpet rake attachment
- Hard surface squeegee tool
Correct answer: Detail upholstery tool with narrow slot nozzle
Narrow slot upholstery tools allow precise cleaning and moisture extraction in seat seams, bolsters, and tight interior spaces.
Question 6: When using a DA polisher on a hood with multiple layers of paint oxidation, which pad choice is most appropriate for the correction stage?
- Black finishing foam pad
- Green or orange medium-cut foam pad
- White or red heavy-cut wool pad (Correct answer)
- Blue ultra-soft applicator pad
Correct answer: White or red heavy-cut wool pad
Heavily oxidized paint requires an aggressive cutting pad (wool or heavy foam) to remove the damaged clear coat layer efficiently.
Question 7: What safety precaution should be taken before servicing or changing pads on an electric polisher?
- Switch the machine to its lowest speed setting
- Allow the pad to spin down naturally
- Unplug the machine from the power source completely (Correct answer)
- Apply the safety lock button while the pad is still spinning
Correct answer: Unplug the machine from the power source completely
The machine must be fully unplugged before any pad changes to prevent accidental activation during servicing.
CD Polisher & Extractor Equipment 3
When a rotary polisher creates 'holograms' or 'buffer trails' on dark paint, what is the most likely cause?