Paint Stripping Techniques

Chemicals

• A number of chemicals on the market can strip paint, typically by dissolving the paint. The chemical sits on the surface to dissolve the old paint. After the manufacturer's specified time, scrape the paint off. Depending on the number of coats of paint, it may take more than one round of chemical stripper to finish the job. The surface will need cleaning, usually with water or mineral spirits, prior to applying a new coat of paint. The surface may also require a light sanding before painting.

Chemical Considerations

• Many stripper chemicals produce toxic fumes, so only apply stripper chemicals in well-ventilated areas. Some non-toxic, environmentally-friendly chemicals exist, but cost more than standard stripper chemicals. Also, different chemicals damage different materials, so carefully read the chemical labels prior to purchase or use.

Abrasives

• Abrasives, such as sandpaper, can also remove paint from a surface. The most physically work-intensive method, hand sanding works best with thin paint and carved surfaces where mechanical sanders might damage the appearance. Drum sanders can be used for removing paint, but orbital sanders, though slower, provide the best performance for paint removal. Orbital sanders help the user to avoid the scoring and gouging problems common with sanding drums and sanding discs.

Heat

• The application of heat can cause paint to separate from a surface. Even though focused open flames can perform the work, a dedicated heat gun provides a somewhat safer means of heat-based paint stripping. As heat is applied to a small area of paint, the paint bubbles up away from the surface and a scraper can remove it. The heat source needs to stay in motion over the area to avoid damaging the wood underneath the paint.

Health and Safety

• Paint on older houses and antique furniture often contain lead, which can lead to serious health problems if inhaled or ingested. In order to protect against lead exposure and toxic fumes from stripper chemicals, always wear either a dust mask or respirator. Popular Mechanics recommends cartridge respirators with P95 or P100 ratings, which filter most or nearly all particulates and certain fumes. Use chemical-resistant gloves when handling stripper chemicals, as they can burn the skin, and goggles to protect the eyes from splashed chemicals and dust.