CD CD Paint Defect Analysis & Correction 2

Question 1

What is the standard grit progression when wet sanding a clear coat before polishing?

Accepted Answer

Coarser grit first, then progressively finer grits

Answer

Wet sanding always starts with a coarser grit to remove the defect, then progresses through increasingly finer grits to eliminate sanding scratches before polishing.

Question 2

Which condition would make paint correction unsafe or inadvisable on a vehicle?

Accepted Answer

Paint depth readings below 2 mils (50 microns) on clear coat

Answer

Clear coat below 2 mils (approximately 50 microns) is dangerously thin, and further cutting via polishing risks burning through to the base coat.

Question 3

What type of paint defect is described as a chalky, dull, faded appearance on older or sun-damaged vehicles?

Accepted Answer

Oxidation

Answer

Oxidation is the breakdown and fading of paint caused by UV exposure and environmental elements, resulting in a chalky, dull appearance that can often be corrected with a cutting compound.

Question 4

What causes 'orange peel' texture in automotive paint, and how is it typically corrected?

Accepted Answer

Imperfect paint application during manufacturing, corrected by wet sanding and polishing

Answer

Orange peel is a textured, uneven surface from the spray application of paint during manufacturing, and it is corrected through wet sanding followed by machine polishing.

Question 5

Acid etching on vehicle paint is most commonly caused by which environmental contaminant?

Accepted Answer

Bird droppings and insect residue

Answer

Bird droppings and insect residue contain uric acid and digestive enzymes that etch into clear coat, causing permanent marks if left untreated.

(CD) Certified Detailer Practice Test

(CD) Certified Detailer Practice Test

CD CD Paint Defect Analysis & Correction 2