Lifting, blistering or missing: which one you have
Veneer damage usually falls into three types, and each needs a different fix:
- Lifting edges. An edge or corner has come unstuck from the piece, often after moisture or heat.
- Blisters. An air or glue pocket has formed under the veneer, leaving a raised bubble.
- Missing or chipped pieces. Part of the veneer has broken away, leaving a gap or a notch.
Tap gently over the area with a fingernail or the back of a knife handle. A hollow sound suggests a lifted or blistered section. Check the edges closely, since lifting often starts there.
Reglue lifting veneer with hide glue
Most older veneer was laid with hide glue. Hide glue softens with heat and moisture, so the old glue can often be reactivated and the veneer pressed flat again. Using hide glue for the repair keeps it reversible, which is why it’s the usual choice for antiques.
For a lifted edge:
- Clean out old glue and grime from under the edge with a thin blade, then brush or blow out the dust.
- Work hot or liquid hide glue under the edge with a thin blade or a glue syringe.
- Lay a damp cloth or a sheet of kraft paper over the area. Press a household iron, on a medium setting, over the cloth for a few seconds to soften the glue. Keep the cloth damp, not soaking.
- Press the veneer flat with a caul, then weight or clamp it. Put wax paper between the caul and the veneer so the squeeze-out doesn’t stick.
- Leave it clamped overnight, or as long as the glue requires, and then remove any dried excess.
For a blister, slit it along the grain with a sharp knife. Work glue in with a syringe or a thin blade, press the veneer flat, and clamp it the same way. Test the iron on a hidden area first, and keep it moving, because heat can scorch the finish.
Patch a chip or missing piece
The goal of a patch is to match the species, color and figure of the surrounding veneer, with the grain running in the same direction.
Clean up the damage
Use a sharp utility knife or chisel to square off the edges into a simple shape. A boat or lozenge shape cut along the grain hides better than a square.
Cut a matching patch
Find a piece of veneer that matches the species and, where possible, the age. Aged veneer matches more closely than new stock. Veneer suppliers and salvaged veneer are common sources.
Tape the patch material over the damage, then cut through both layers at once with a sharp knife. This double cut gives a patch that fits the hole exactly.
Glue and hold
Glue the patch in with hide glue. Hold it with gummed veneer tape while the glue sets, and dampen the tape to remove it afterward. Cover the patch with a flat board and add weight or a clamp.
Shim for thickness
Modern veneer is often about 0.6 mm thick, or roughly 1/42 inch. Antique veneer is often thicker, sometimes around 1.5 to 3 mm. If the new veneer is thinner than the original, the patch will sit low. Shim under it with a layer of veneer or paper so it sits level, then scrape or sand it flush.
Wood filler in place of a missing piece usually shows under the finish. Use it only for very small spots that are out of sight.
Scratches in veneer: finish-only or through
Look at the scratch first. A scratch that’s only in the finish usually looks white or gray. It can often be treated with a finish-level product or a solvent. A colored, raw-looking scratch has reached the veneer, and it needs filling and color.
Don’t sand a scratch on veneer to make it disappear. Veneer is thin, and a sander can cut through it in seconds. How to repair deep scratches in wood furniture explains a fill-and-color method using wax fill sticks or burn-in sticks, which can also be used on veneer.
There isn’t one product for every scratch. Match the product to the depth.
Downsides of wood veneer
Veneer has real limits. It’s thin, so it can’t take the sanding that solid wood can. It lifts when moisture or heat reaches the glue. A sand-through shows quickly, and repairs are harder to hide. A patch that doesn’t match in color or grain stands out.
Veneer also has a long history in fine furniture, which is why many antiques are veneered. How to tell solid wood from veneer furniture explains how to check. It isn’t cheap by definition. The main thing to keep in mind is that veneer needs gentler handling than solid wood.
Can you put new veneer over old?
Overlaying can be done on some modern, flat surfaces, but on an antique it’s usually the wrong approach. New veneer over a lifting or damaged area adds thickness, hides the cause, and the old layer may keep lifting underneath. It can also change the look and value of the piece.
A better approach is to reglue the lifting veneer and patch the missing areas with new veneer cut to fit. That keeps the original surface in place.
What not to do to antique veneer
- Don’t sand through the veneer. Sanding thin veneer, especially with a power sander, is one of the most common ways to ruin it.
- Don’t use super glue. It’s brittle, can stain the wood, and can’t be reversed.
- Don’t use contact cement. It creeps over time, can’t be reversed, and isn’t suitable for antiques.
- Don’t use a heat gun on veneer. The heat can release the glue.
- Don’t soak it in water. Water can loosen hide glue and raise the grain.
- Don’t fill missing veneer with wood filler. It usually looks obvious under the finish.
- Don’t refinish unless you have to. Refinishing can remove the patina that gives an antique its value. More in what not to do to antique furniture.
- Don’t throw away loose pieces. Save them for regluing or patching.
Vinegar, olive oil and other home fixes
Home remedies such as vinegar and olive oil are often suggested for scratches. They may darken a light scratch for a short time, but they don’t fill it, and they can leave a residue on the finish. Oil-based products, including WD-40, have the same limit. See does WD-40 take scratches out of wood.
For the least-invasive order of steps on a veneer surface, read how to restore a veneer furniture surface.
Safety
Keep your fingers clear of the iron and the steam, since both can burn. Keep the cloth damp, not soaking. If you use solvents or stripper on a veneer surface, work with good ventilation and wear gloves and eye protection.