car painting techniques
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Car Body Painting Stages, Complete Car Painting Tutorial. There are several differences in the painting process when viewed from the paint material to be used. For example, painting for solid top coat uses a darker base paint of the same color, metallic finish must use silver base paint, candy finish paint must use silver base paint, ‘chameleon’ paint (color can vary depending on light received by the vehicle body) must use black primer and so on. This discussion will only discuss the painting process in general.
Painting the Car: Surface Preparation
Clean the metal surface to be fixed with a multi
thinner and dried.
Sand the metal surface with dry sandpaper no. 80.
Clean the surface from sandpaper dust with a multi thinner and
dried.
Painting Cars: Putty Application
In detail, follow these steps:
Apply putty mixed with hardener to fill in any uneven spots. Let it dry in the air for 30 minutes or
dried with infrared lamp at ± 50 ° C for 10 minutes.
Sand the putty surface with dry sandpaper no. 80 followed by no. 180 and no. 280 or wet sandpaper no. 240 followed by no. 320 and no. 400.
Clean the surface from sandpaper dust with a multi thinner and dry it.
Painting the Car: Sanding
Things that need to be considered in sanding:
The sanding work can be started after the putty drying reaction has ended. If the putty is sanded before it cools completely,
then there is a possibility of shrinkage.
To prevent deep scratches around the paint, try to sand only the area covered with the putty.
Do not sand the whole area at once, but be careful to check the surface level before sanding continues.
Painting Cars: Masking
In repainting or painting work to make strips of paint stripping masking, the aim is to prevent over spray from the spray gun in the form of a mist of paint particles that can cause rough surfaces on the paint on the body parts that are not repaired.
Paint the Car: Operate the Spray Gun
There are four important things in moving a spraygun, namely:
spraygun distance,
Spraygun angle,
swing stroke speed,
Overlapping pattern.
Painting the Car: Final Painting
The painting process can be classified into two types, namely:
Oven painting. It is a painting process in a special room (closed) with a drying temperature of approximately 80 ° C.
Non-oven painting (outside air temperature) It is a process of painting in an ordinary room (not closed) by drying in an outside air temperature of ± 25 ° — 30 ° C.
Car Painting: Polishing and Glossing
The term polishing in painting is the job of smoothing the surface of the paint after painting. The result of the painting is still a lot of dust and possibly an uneven thickness. To do polishing, it can be done with the help of fine sandpaper first (if the surface is too rough) or directly with a compound (if the surface is smooth. How to polish can use manual hands, or better use a polishing tool that will produce a stable groove.
