Dulling semigloss paint increases the surface area of the paint for repainting. A fine sandpaper dulls the shine as it makes tiny scratches in the paint. These scratches are hard to see, but the loss of the shine is noticeable and new paint will have more surface area to bond with. Oil-based semigloss creates a little bit of dust when sanded, and latex semigloss doesn't. Latex has a tendency to gum up when sanded, because the friction causes heat. Sanding lightly and slowly is the best technique for dulling semigloss paint.
- Skill level:
- Moderately Easy
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Things you need
- 220-grit sandpaper
- Tack cloth
Fold a piece of 220-grit sandpaper into a square and grip it in your hand.
Sand the shiny, semigloss surface up and down and from side to side until the shine is gone and a dull lustre is revealed. Sand any grooves by folding the sandpaper into smaller squares and angling the paper down toward the ground. Pinch the ends of the paper in your fingers and slide the sanding corner of the paper up and down or side to side in the groove.
Go over the dulled surface with a tack cloth to remove all dust film. The semigloss can now be primed and painted.
Tips and warnings
- Avoid using orbital sanders on latex, as excessive gumming will result and ruin the smoothness of the paint.
- Wear a dust mask and eye goggles to avoid dust inhalation and dust-to-eye contact.