Most second-hand furniture arriving from thrift stores carries at least two layers of finish — sometimes four or five, applied over decades without stripping in between. Before any stain or fresh topcoat can be applied, those layers need to come off cleanly. The challenge is removing them without raising the grain excessively, gouging softwood surfaces, or leaving chemical residue that interferes with the new finish.

Step 1: Identify the Existing Finish

The method you choose depends on what's already on the piece. A few quick tests help narrow it down:

  • Denatured alcohol on a rag: If the finish softens and comes off on the cloth, it's shellac — the easiest to remove.
  • Lacquer thinner: If it dissolves the surface slightly, you're dealing with lacquer.
  • Neither dissolves it: Varnish, polyurethane, or conversion varnish — requires chemical stripper or mechanical removal.
  • Paint: Usually identifiable visually. Layer count matters — older furniture may have latex over oil over shellac.

Test any solvent on an inconspicuous area first. The underside of a drawer front or the back of a leg works well for this — enough surface area to get a clear result without risking a visible section.

Steel wool used for light finish removal on wood
0000-grade steel wool is useful for light finish removal and between-coat scuffing, though it leaves fine fibres behind that must be vacuumed thoroughly before staining.

Chemical Strippers

For polyurethane and oil-based varnishes — the most common finish on Canadian-made 1970s and 1980s furniture — a chemical stripper is usually the most efficient choice. The two types available at Canadian hardware stores differ significantly in dwell time and safety profile:

Citristrip (methylene-chloride-free)

Available at most Home Depot locations in Canada, Citristrip is a gel-based stripper that works more slowly than solvent-based alternatives but is considerably less hazardous. Applied thickly to horizontal surfaces and covered with plastic sheeting, it can be left for 4–24 hours. On flat panels — table tops, drawer fronts — it works well and produces minimal grain raising. On carved or turned surfaces, the gel can be difficult to remove completely from recesses without a stiff-bristle brush.

Dwell time varies with temperature. In a cold garage (below 15°C), double the recommended time. The stripper will stop working if it dries out; the plastic covering is not optional in dry conditions.

Klean-Strip Premium Stripper

For thick paint accumulations — particularly on pieces painted multiple times over original stain — a stronger solvent-based stripper cuts through faster. Klean-Strip's premium formula is available at Canadian Tire. Work in a well-ventilated space, wear nitrile gloves and eye protection, and apply a neutraliser wash (mineral spirits followed by water if switching to a water-based topcoat) once the old finish is fully removed.

Heat Guns

A heat gun is most useful on paint — particularly thick oil-based paint on flat surfaces like chair rails, table aprons, and door panels. The finish softens and can be pushed ahead of a wide scraper in sections. The technique requires more physical effort than chemical stripping but produces no chemical waste and leaves no residue to neutralise.

Two precautions specific to older Canadian furniture: first, pieces from before 1978 may contain lead-based paint. Heat-gun removal of lead paint produces hazardous fumes and is not recommended without proper respiratory protection and containment. If the piece is from an estate sale or antique market and pre-dates the early 1980s, a lead test swab (available at Canadian Tire under the brand First Alert) is a reasonable precaution before applying heat. Second, heat guns can scorch softwood — pine and basswood in particular — if held in one position for more than a few seconds.

Mechanical and Hand Scraping

Cabinet scrapers, card scrapers, and paint scrapers are effective on thin finish layers and are the lowest-risk method for preserving surface detail on carved pieces. A well-sharpened card scraper removes one layer at a time with control that no chemical or heat method matches. The trade-off is time: scraping a six-chair dining set by hand takes considerably longer than a chemical soak.

Random-orbit sanders with 80-grit paper are sometimes used for stripping, but they remove wood as readily as finish and are difficult to control on edges and corners. For most thrift-store pieces, mechanical sanding is better reserved for the smoothing phase after stripping rather than as a primary removal method.

After Stripping: Surface Prep

Once the old finish is off, the wood needs to be prepared before any new stain or topcoat is applied:

  1. Wash off chemical stripper residue with mineral spirits (for oil-based topcoats) or water and white vinegar diluted 1:4 (for water-based products). Allow to dry fully — at least 4 hours in a warm space.
  2. Sand the surface in the direction of the grain: start at 100 or 120 grit if the stripper left any raised texture, move through 150, and finish at 180 or 220 depending on the topcoat manufacturer's recommendation.
  3. Wipe with a tack cloth before staining. Mineral spirits can be used as a "pre-stain conditioner preview" — wet the surface to see how the grain will read once a clear finish goes on.

Water-based stains raise the grain even on well-sanded surfaces. Many finishers raise the grain intentionally by wiping with a damp cloth, allowing it to dry fully, then lightly sanding at 220 before applying any water-based product.

Further Reference

For product-specific data sheets and safety information: