One of the most detailed processes in the plant is painting the vehicles. This area's ultimate objective is to apply all coatings at the highest level of efficiency with the best appearance possible. TMMK uses both water-bome and solvent-based paints.

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The Toyota painting process involves eight basic areas. The first step in the process is phosphating. This area removes dirt, grease and other contaminants from the steel body.

A phosphate coating is also applied to improve corrosion resistance and adhesion of the primer and top coats.

Electrodeposition is the second phase. The body is totally immersed into a tank of electrically-charged primer, permanently bonding the primer to the steel. The car then goes through a water spray to remove excess film and then to a dry-off oven.

In the dry sand and sealing area, seam sealer is applied to prevent corrosion and water leaks.; The body is then taken through an anti-chip procedure. A coating is applied to the bottom of the cars, the area that receives most of the gravel and road damage. An additional coating to prevent corrosion and noise is also applied.

The fifth stage is primer surfacer. Here a high solid primer is applied to smooth out the appearance of the previously applied primers. The material is then baked at 280 degrees Fahrenheit for 30 minutes. This next process is called wet/sand. Top coat is the seventh area of painting. The car is then baked at 250 degrees for 30 minutes.

At final inspection, the painted body is checked for defects. Upon approval, the cars are shipped by overhead conveyor to the assembly area.

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