repainting an interior windowsill and frame is a simple DIY task when you follow a few easy steps firstly close your window to stop any dust blowing in and lay down a drop cloth to check the condition of the existing paint lightly cut crosses in random places press masking tape onto the crosses and pull if paint is removed on the tape the surface is not sound and needs to be removed by sanding or scraping it's important to also remove any other flaking paint with a scraper now fill any holes and cracks with SPAC filler overfill the holes and scrape off sad any bad timber and previous coatings feathering edges of bare areas and chips as this coating is enamel paint it needs a heavy sand with 120 grade sandpaper to remove all boss from the surface if the previous coating is known to be acrylic paint sand it lightly with 180 grade sandpaper ensure the surface is clean by washing with sugar soap and warm water if mold is present clean the surface with one part mold solution and three parts water and rinse well with clean water for enamel surfaces and bare timber apply one coat of new look extra prep quick grip primer sealer undercoat this is a great product specifically designed to stick to high gloss services under coating is not necessary when the previous coating is acrylic once the quick grip is dried it's time for the top coats for a hard wearing durable finish use a premium quality paint like new look extra wear gloss acrylic stir the paint and pour into a paint pot use a quality paint place filament brush and apply two coats to make the job easy paint the head of the frame first followed by the left hand and right hand sides and then paint the bottom sill section cleanup is easy when using new look extra wear glass acrylic simply wash the brush in water always dispose of water carefully and responsibly if you have any questions or would like further advice please call in to your local pipeline store or call our toll free number 1-800 double-o eight double-oh-seven and we can direct you to your nearest or