Before painting your house's interior or exterior, it's important to deal with existing paint problems. Although you can simply cover over old, peeling or chipped paint with a fresh coat, this approach tends to leave telltale rough edges.
In a certain light, this kind of paint fix is highly visible. For key areas—or if you are just more of a perfectionist—you will want the underlying layer to present a perfectly smooth, flat surface as the base for a fresh coat of paint.
Basics of Fixing Chipped, Peeling Paint
If you're extremely motivated, you can strip off every square inch of paint right down to bare wood, But it's easier and more logical to make spot fixes instead of stripping away all of the paint.
When peeling or chipping paint is found in a small area, you may be able to simply brush off the peeling paint, then prime the wall and paint over it. As long as the remaining edges of the peeling area are stable, this solution will work. But it's not always the most attractive solution, especially if you're dealing with peeling or chipped paint that is several layers deep.
A better method is to fill the depressions with wood filler before priming and painting. In addition to being more attractive, this method also helps protect those edges of existing paint so that they are less likely to begin peeling again.
This type of fix is best for small and infrequent patches of peeling or chipped paint. If the house is badly damaged, all of the paint should be removed.
Older homes, especially those built before 1978, may have been painted with lead-based paint. Lead-based paint has been proven through research to cause neurological damage. It is particularly harmful to pregnant women and to children. Test the paint for lead before you begin stripping or sanding it. If it does contain lead, have the paint removed by a qualified remediation company.
Equipment / Tools
- Putty knife
- Paint scraper or five-in-one tool
- Wire brush
- Sander with fine-grit sandpaper
- Paint brush
- Wood filler
Scrape Away Loose Edges
With a paint scraper or five-in-one tool, scrape away loose edges of the painted area. Stop when it becomes too difficult to pry away the paint. Also, take care not to gouge or damage the wood with the sharp edges of the scraper.
Remove Loose Paint by Brushing
With a wire brush, vigorously sweep away remaining debris from the area. Work the edges of the damaged areaa once again. If more paint begins to peel, go back and pry it away with the paint scraper.
Apply Wood Filler
Apply wood filler to a putty knife and spread a thin layer of filler across the damaged area. Make sure that the wood filler extends slightly beyond the perimeter of the damaged area This excess wood filler will later be sanded away. Be sure to flex the putty knife to produce a flat surface.
Do not apply the wood filler thickly as this will only be more material for you to sand away. Apply only enough to cover the damaged section, plus just a bit higher.
Allow Wood Filler to Dry
Allow the wood filler to completely dry, as directed by the manufacturer's instructions. This normally takes 45 minutes to one hour, but you may wish to give it at least 2 hours. If you try to sand before it has thoroughly dried, the filler will slough off when you sand. Water-based wood filler will dry faster than oil-based wood filler.
Sand Down the Wood Filler
Attach a fine-grit paper on the oscillating sander and grind down the patched area until it is flush and smooth with the surrounding paint. Avoid sanding down all the way to bare wood.
Check for Smoothness
Run a bare hand over the patched area to feel for smoothness. The patched area should blend in with the surrounding paint. If you are unable to smooth the area entirely—such as when the board is badly damaged—an option is to replace the board entirely.
If the wood filler is not flush with the surrounding wood, repeat the earlier steps.
When the filled area is smooth to your satisfaction, apply a primer to the entire surface to prepare it for painting. Priming the entire surface will help the filled area blend in perfectly when you apply paint. If you do not prime, the patched area may absorb paint at a different rate then the surrounding area.
Mason, Lisa H et al. Pb Neurotoxicity: Neuropsychological Effects of Lead Toxicity. BioMed Research International, 2014, 840547, 2014, doi:10.1155/2014/840547