Reviving Old Doors with Sanding and Fresh Paint

Why Old Doors Are Worth the Effort

Solid timber doors are one of the great survivors of the British home. A well-made Victorian four-panel, a 1930s ledge-and-brace or a postwar flush door will outlast anything flat-packed, and reviving one costs a fraction of replacing it while keeping the proportions that make a room feel right. Before you commit, check for the genuine deal-breakers: deep splits running with the grain, rot in the bottom rail, or a door that has been trimmed so thin the panels rattle when it shuts. If the stiles and rails are sound, everything else is cosmetic — and perfectly achievable over a weekend or two of evenings.

Strip It Back: Hardware, Dents and Old Finishes

Take the door off its hinges and lay it flat on a pair of trestles. You will get a far better finish than painting it in place, and you won't be fighting gravity or dripping onto the carpet. Remove every piece of hardware — handles, escutcheons, hinges, latches, letterboxes and knockers — and bag the screws in a labelled sandwich bag, because old slotted screws are surprisingly hard to match.

• If the house predates the 1960s, test for lead paint before you start sanding. A swab kit from a decorating supplier will tell you whether to wet-sand and seal rather than dry-sand.
• Wash the whole door with sugar soap and warm water to lift grease, nicotine and hand oils, paying extra attention around the handle side.
• Scrape flaking paint back to a firm edge with a shave hook, then feather the edges with 120-grit paper so the repair doesn't show as a ridge.
• Fill dents, old screw holes and hairline splits with a two-part wood filler. It sets harder than the soft ready-mixed tubs and won't shrink back after a month.

Sanding: The Step Most People Rush

Sanding isn't only about smoothing — it's about giving the next coat something to grip. Work through the grits in order: 120 to knock back filler and raised grain, 180 for the general surface, and 240 on anything that will receive a satin or gloss finish. Always sand with the grain on flat panels, and wrap your paper around a cork or rubber block rather than using your fingers, which will dish the surface. On mouldings and beading, a foam sanding pad follows the profile without flattening it. Wipe down with a tack cloth, then a barely damp cloth, and let the door dry completely before priming. Dust left behind shows through a satin finish like grit in a photograph.

Choosing a Paint That Survives Daily Use

Doors take more punishment than any other painted surface in the house: hands, keys, rings, the occasional shoulder. Whatever you choose, buy a product described as hard-wearing or suitable for trim, and always apply a primer over bare timber and filler patches. Knotting solution goes on any knots first, or resin will bleed through within weeks.

• Eggshell — low sheen, forgiving over imperfect mouldings and ideal for period doors in a heritage colour.
• Satin — the workhorse for hallways and family homes, wiping clean without the mirror shine of gloss.
• Gloss — still the most washable and historically correct for many front doors, but it reveals every ripple in the surface beneath.
• Chalk-style and matt emulsions — lovely on a bedroom door, but they mark easily. Add a clear protective wax or varnish if they'll be used daily.

Water-based and hybrid alkyd paints are the practical modern choice: they cure tough, dry in a couple of hours so you can complete two coats in a day, and they don't yellow the way traditional oil-based gloss does.

Period Details or Modern Interiors?

Let the architecture guide the finish. In a period home, keep the panel mouldings crisp — brush any paint out of the corners rather than letting it pool, and mask or remove door furniture rather than painting around it. Deep colours such as olive, clay pink or ink blue give panelled doors the weight they deserve, and a darker door against pale walls adds instant character to a plain hallway. For a modern flat or new-build, a flush or shaker door suits a cooler palette. Painting the door the same colour as the walls creates a seamless, calm look; painting the architrave to match the door sharpens the whole opening. Don't forget the top and bottom edges — sealing them protects against draughts and swelling.

Finishing, Refitting and the First Few Weeks

Lay the paint off in long, even strokes in one direction and keep a wet edge to avoid lap marks. Two thin coats will always beat one thick one. Allow the door to cure properly — hybrids and oil-based paints can take several days to harden fully — before hanging it back on its hinges.

• Refit hinges with slightly larger screws if the old holes have crumbled, and tighten the pin if the door is loose.
• If the door rubs, ease the leading edge with a light sand and touch in the paint, rather than planing off more than you need.
• Fit a doorstop or wall hook so the handle doesn't mark the plaster.
• For the first fortnight, clean with a damp cloth only — no abrasives or spirit-based cleaners — while the finish cures.

Look after that first repaint and the door will carry on for another thirty years, quietly doing its job.