IDA Washing and Decontamination 2

Question 1

What type of water is recommended for a final rinse in a professional detail and why?

Accepted Answer

Deionized or reverse osmosis (RO) water to prevent mineral water spots

Answer

Deionized or RO water contains no dissolved minerals, so it does not leave behind the calcium and magnesium deposits that cause water spots when it evaporates.

Question 2

What is a 'foam cannon' or 'foam gun' used for in a professional wash process?

Accepted Answer

Pre-soaking the vehicle with a thick foam layer of diluted shampoo to dwell and loosen surface dirt before contact washing

Answer

A foam cannon applies a thick blanket of diluted shampoo that clings to the surface and dwells to soften and loosen dirt, reducing the need for aggressive contact washing.

Question 3

How should wheels be washed relative to the rest of the vehicle to prevent cross-contamination?

Accepted Answer

Wash wheels first with dedicated wheel tools before washing the paint panels

Answer

Wheels are the most contaminated part of the vehicle and should be cleaned first with dedicated brushes and cleaners to prevent brake dust and iron particles from contaminating the paint wash tools.

Question 4

What is the safest drying method after a professional wash to minimize swirl introduction?

Accepted Answer

A clean, thick plush microfiber drying towel with gentle blotting or a filtered forced-air dryer

Answer

A large, plush microfiber drying towel used with gentle blotting or a forced-air dryer minimizes paint contact and friction, significantly reducing the risk of introducing swirl marks during drying.

Question 5

What does the 'zip baggie test' reveal about a paint surface?

Accepted Answer

Whether the paint surface has bonded contamination by feeling for roughness through the plastic bag

Answer

Dragging a finger in a plastic bag across the paint amplifies texture, allowing you to feel whether the surface has bonded contamination that requires clay bar decontamination.

IDA - International Detailing Association Practice Test

IDA - International Detailing Association Practice Test

IDA Washing and Decontamination 2