volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Paint repair on steel plates and zinc-coated steel plates > < Paint Repair
General information
General information
The condition for a good craft painting is that the workplace, the tools and the pieces of equipment are always in clean condition. In order to keep the paint as free from dust as possible, it is indispensible to install a good ventilation and exhaust system.
This is also necessary in order to prevent the formation of explosive mixtures of air and vapors of solvent. In the painting cabinet (painting compartment) there should be a permanent overpressure. Therefore an airflow speed of 0,3 m/s is sufficient. Higher speeds cause failures in the process, such as, for example: loss of shine, formation of wrinkles and an excessively quick drying of the surfaces.
The products must be maintained and handled according to manufacturer's instructions, to prevent the emergence of failures in the process or drying and to maintain the warranty against perforation due to corrosion.
The room temperature must be between 20 and 25 °C. ‎Lower or higher temperatures may cause pores and a bad-quality process. Due to the high air humidity, damage may occur to the paint, such as, for example: stains in the layers of paint (mat layer), adherence failures and craters.
Treatment principles:
t  The part to be painted may not contain remains from sanding and salts.
t  The humidity of sanding must dry well. This takes approx. 2 hours at an ambient temperature of +20 °C.
t  The part to be painted must be clean, without oiliness and dry.
t  Also avoid and remove sweat from the hands on the part to be painted.
t  The part to be painted must be at the same temperature of the environment at the time of application of the material, this way condensation of water is prevented.
t  The air spray must be dry. Oil and water drip trays must be emptied and controlled at regular intervals.
   

Paint repair on steel plates and zinc-coated steel plates > < Paint Repair