Compared to classic wet painting, powder coating has a number of advantages. Powder coating is faster, more economical, the quality of the coating is more consistent and the process is environmentally friendly. But very few people have the opportunity to apply powder coatings at home. You can find out how to paint over a powder coating in our step-by-step instructions.
Most powder coatings can be painted over relatively easily with a suitable paint. Two-component paints are particularly suitable here. These two-component paints are therefore not yet mixed ready for use, they are delivered in two containers. The base paint contains binders, solvents, fillers and, if necessary, color pigments. The hardener, the second component, ensures that the 2K paint hardens properly after application. After the final hardening, a solid, hard, very resistant paint layer is formed
In preparation, it is usually not necessary to sand the powder coating. Depending on the coating, sanding can result in the sanding marks becoming very visible during painting.
You should therefore test in an inconspicuous area beforehand whether it is necessary to sand the coating.
- If in doubt, carry out an adhesion grinding. Use a P320 grit for this.
- Use a suitable thinner for your lacquer to wash the piece thoroughly wet after sanding.
- When washing off with the thinner, the powder coating swells up slightly.
Paint over the powder coating
Mix the two paint components immediately before application according to the manufacturer's instructions. Then proceed as follows:
- Let the dilution dry off. Immediately afterwards start painting.
- You will achieve the best results when spraying the paint, you can also paint with a brush or a roller.
- When painting, make sure that the paint is well covered.
- Let the paint dry for at least 24 hours before you continue handling the painted piece.
Please note that the chemical drying of your paintwork can take up to 10 days at a temperature of 20 ° C. The lacquer is dried beforehand, but the lacquer only reaches its full resistance when all chemical reactions have been completed. So you have to plan a period of 5-10 days before you put full load on the paintwork.