Stripping & Refinishing Wood
Refinishing is often the most rewarding repair and the easiest to rush. The finish on a piece of furniture is a thin protective layer, and replacing it well depends less on effort than on reading what is already there and working in the right order.
First, decide whether to refinish at all
Not every tired surface needs stripping. A finish that is intact but dull often only needs cleaning and a fresh coat of compatible product. Stripping to bare wood removes original patina permanently, so on older or sentimental pieces it is worth pausing to consider a lighter revival first.
Identify the existing finish
Knowing the old finish guides every choice that follows. A simple test in a hidden spot helps:
- If a cotton swab with denatured alcohol softens the finish, it is likely shellac.
- If lacquer thinner softens it, it is likely lacquer.
- If neither has much effect, it is probably a varnish or polyurethane that will need mechanical removal or a stripper.
Stripping versus sanding
On flat, simple surfaces, careful sanding may be enough. On turned legs, carvings, and mouldings, a chemical stripper reaches detail that sandpaper cannot without rounding it over. Choose a stripper rated for your finish, follow its directions exactly, and work with good ventilation and protective gloves.
Safety
Strippers, solvents, and the dust from old coatings can be hazardous. Read the product's safety data, ventilate the space, and dispose of rags and waste according to local regulations rather than balling up oily rags, which can pose a fire risk.
Preparing the bare wood
After stripping, neutralise and let the wood dry as the product directs. Sand progressively through finer grits, moving with the grain, and remove all dust with a vacuum and a tack cloth. The surface you create here is the surface you will see under the finish, so any scratch left now will show later.
Building the new finish
Whatever product you choose, thin coats win. The order of work is consistent across most clear finishes:
- Apply optional stain or oil and let it penetrate, wiping back the excess.
- Lay down a thin first coat of your chosen top finish.
- Let it cure, then lightly de-nib with fine abrasive before the next coat.
- Repeat until the surface is even, adding coats rather than thickness.
| Finish | Character |
|---|---|
| Oil (e.g. linseed, tung) | Natural look, easy to repair, less surface protection. |
| Shellac | Warm tone, fast drying, sensitive to alcohol and heat. |
| Varnish / polyurethane | Durable film, good for tabletops, slower to cure. |
Letting it cure
A finish that feels dry is not necessarily cured. Give the final coat the full cure time before heavy use, and longer before placing objects on a tabletop, so the surface hardens fully.
Further reading
The Smithsonian Museum Conservation Institute offers background on finishes and the care of wooden objects for those working on significant pieces.