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Why does atomic ash seep out peroxides during sheet metal painting? If this situation occurs, how should we
solve it? Below, the editor will explain the handling methods for this situation
The peroxide exuded by atomic ash will appear red/appearing red, making it easy to distinguish
Definition: The filling ash (atomic ash) that fills the car body exudes peroxide.
Cause: Polyester filling ash (atomic ash) used too much peroxide hardener mixed insufficiently.
Preventive method: Use the manufacturer's recommended amount of hardener and mix thoroughly by weight
or using a hardener dispenser to measure the amount of hardener.
Remedial method: Polish the affected area, isolate it with spray atomic ash, and then spray again.
Hanging (drip and heavy flow)
Definition: Paint flows vertically down the vehicle body.
Cause: Incorrect spraying viscosity, spraying method, static time between layers, and paint film thickness.
The nozzle diameter is incorrect or the spray pressure is incorrect. The temperature of the paint, substrate, or
spray booth is too low, and incorrect hardeners and diluents are used.
Preventive method: Follow the construction method recommended in the technical data; Ensure that the spray
gun operates well. Heat up the sprayed workpiece and paint to a room temperature of 20 degrees. Pay attention
to spray overlap, air pressure, and distance.
Remedial method: After the topcoat has completely hardened, use sandpaper to polish, cotton balls, and
polishing materials to remove flowing and sagging. Polish and repaint if necessary.
Translucency
Definition: The original car paint penetrates the color of the newly painted surface, and the topcoat discolors or
penetrates.
Cause: The pigment of the original paint reacts and dissolves with the thinner of the top paint. Pollution, soluble
dyes or pigments are usually present on old paint before repainting. The old paint did not seal well. Too much
hardener is used for polyester putty and soil filling.
Prevention method: If it is expected that color transmission may occur, first spray a small piece of new paint on
the old paint for experimentation. If color transmission does occur, spray a primer for isolation. When preparing
polyester putty and adding soil, please use the recommended amount of hardener.
Remedial method: Polish, isolate the original paint with a primer, and then re spray.