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Where moldings have been poorly decorated and/or paint buildup has left them in poor condition, simply sanding the area can help. This technique can be used on all kinds of moldings. Paint buildup in the grooves of the profile often creates an unsightly effect. Filling these areas as shown here improves their appearance. Flexible caulk cannot be sanded when dry, so it must be completely smoothed while still wet.
Sand back the flat sections of the molding as smoothly as possible, and glance across the higher areas of the molding with sandpaper.
Use a vacuum to remove any dust and debris, and then wipe down the area with a damp cloth.