How can you dull the finish of gloss paint to make it look like satin or eggshell?

To dull the finish of gloss paint and achieve a satin or eggshell appearance, you can lightly sand the surface using fine-grit sandpaper (around 220 grit). Be sure to sand evenly to avoid creating uneven patches. Alternatively, you can apply a matte or satin finish clear coat over the gloss paint, which will reduce its shine while preserving the underlying color. Always clean the surface before applying any additional product for the best results.