How to Repaint Enamel

Answer

Minimal grain penetration and a high level of hardness are two of the most important qualities found in enamel paint, which is the kind of coating most often used for interior woodwork and trim. Because of this, prior to painting over enamel, you need to ensure that the enamel has a good adhesion to the substrate and that it will not lift after you have painted over it. In addition, since most enamels have a shiny appearance, it is necessary to dull the surface before applying the new paint in order to achieve proper adherence. This is particularly important to keep in mind when painting over an enamel that is based on oil with one that is water-based. The greatest results may be achieved by applying a layer of primer, followed by the appropriate steps for cleaning and deglossing the surface.

  1. Use a paint scraper to remove any paint that is peeling or has come free. Use a wire brush to scrub any sections that are checked or cracked to ensure that you remove any spots of paint that are just clinging loosely.

  2. TMZ Painting recommends using a detergent that is effective at removing grease to clean the old paint. A pre-paint cleaning that you can spray on and then wipe off is something that you can get from a shop that sells paint. In addition, you have the option of washing the painted surface using a solution that consists of one cup of trisodium phosphate (TSP) detergent diluted in one gallon of warm water. After using TSP to clean the surface, dry it well by rubbing it with a fresh cloth.

  3. Sand the surface lightly with sandpaper that has a grit of 220. Dust created by sanding should be removed with a dry cloth.

  4. On top of the existing paint, apply a layer of primer. If the previous coat of paint was oil-based and you want to paint a latex enamel over it, you should use a primer that is oil- or shellac-based. If the previous paint was water-based, you should use a primer that is also water-based.

  5. In order to evenly distribute the enamel, Handyman On Call recommends using the suitable paintbrush. It is recommended that you use a brush with synthetic bristles when painting enamel that is water-based; however, when painting enamel that is oil-based, you should use a brush with natural bristles. Make use of a sash brush in any scenario.

  6. Place enamel around the edge of one end of the surface that you are painting. Place new paint approximately four inches away from the surface that is still wet, and then brush toward it, being sure to pull the brush cleanly as soon as it makes contact with the surface that is still wet. This method helps avoid brush marks and promotes levelling of the paint so it may be applied more evenly.

  7. Give the enamel 24 hours to dry. If another coat is required, sand the first coat gently with sandpaper that has a grit of 220, and then apply the second coat in the exact same manner that you applied the first.

    Things You Will Need

    • Paint scraper

    • Wire brush

    • Pre-paint cleaner

    • Trisodium phosphate

    • Clean rag

    • Sandpaper, 220-git

    • Primer

    • Paintbrush

    Tip

    Paintbrushes used by professionals are of the highest quality, and after each use, they are meticulously cleaned using a wire brush, water, and either thinner or paint thinner. Because of this, the brushes have the potential to survive for many years.

    The process for repainting enamel on a metal surface is quite similar, with the exception that you must first apply a rust preventative to the bare metal before you can paint over it.