Painting interior doors and trim

If you're repainting a whole room, you'll also want to know what's involved with painting the walls and painting the ceiling — painters typically work ceilings first, walls second, doors and trim last.

Doors take harder use than walls — and need a harder paint

The walls in your room are almost certainly painted in a water-based acrylic at a low- or mid-sheen. It's easy to apply, dries quickly and looks good across a large flat surface. Doors are a different surface with a different job to do.

Doors take constant contact: hands on handles, knocks from bags and furniture, the slow build-up of grease and scuffs around the handle. A flat or low-sheen wall acrylic marks, stains, and won't wash clean without lifting the paint with it. Enamel is harder and more durable. On doors and trim, semi-gloss or gloss enamel resists scuffs, wipes clean, and holds up year after year.3DuluxView source 4CHOICEView source

The higher sheen also creates contrast between the door and the wall — the detail that makes a well-painted room look finished. Gloss is the most formal and most durable. Semi-gloss is nearly as tough but less shiny — the most common choice in homes. Satin suits quieter, modern rooms where full gloss would feel too formal. All three work well on doors; the choice comes down to style, not toughness.

Water-based or oil-based enamel — which to choose for interior doors

Both work. Water-based has taken over most residential interior door work in Australia for practical reasons.1Dulux TradeView source

Sanding first is what keeps the paint on — it's not the optional part

The most common reason door paint fails early — lifting, chipping, flaking at the edges — is poor prep. New paint needs a surface it can grip. Smooth, old gloss gives it almost nothing, so a glossy surface is lightly sanded to a dull finish before any new coat goes on.2DuluxView source 5Haymes PaintView source

A painter sands the whole door with fine paper, then wipes the surface clean of dust. Any dents, cracks or holes are filled and sanded flat. Surfaces are washed down — typically with sugar soap — so the new coat goes onto a clean, smooth base.6DuluxView source

New or bare timber is different. Bare or unprimed timber needs an undercoat or primer-sealer before topcoats, so the topcoat has a sound, even surface to bond to rather than soaking into raw grain.6DuluxView source 2DuluxView source

Skip the sanding on a glossy door and the new paint will look fine for a few months. Then the edges start to chip, the knocks start to lift it, and you're doing the job again. The prep is the job.

Two thin coats beat one thick one — and the sand between them matters

Interior enamel on doors goes on in two coats over a primed or prepared surface.2DuluxView source 5Haymes PaintView source Each coat is applied at the right spread rate — not too heavy. A single thick coat sags and runs on a vertical surface, especially around mouldings. Two thinner coats dry evenly and build a smoother, harder film.

Between the two coats, a light sand with very fine paper removes dust nibs and flattens brush marks. The second coat goes onto a clean surface. The result is noticeably smoother than the same paint without that step.2DuluxView source

On panelled doors, order matters: panels first, then the upright stiles, then the cross rails. This avoids lap marks where sections meet. Some painters take doors off their hinges to paint them flat — no drip risk on a vertical face, and easier to get into each panel edge. A good painter will choose based on the door and the space.

Doing doors with the room costs less — but a standalone doors job makes sense too

If you're repainting a whole room, include the doors and trim in the same visit. The painter is already set up, the walls and ceiling are freshly done, and adding doors and trim at the same time is more cost-efficient than a separate job. It also means the colours coordinate — new walls with tired, old-painted doors often look worse together than either would alone.

A standalone doors-and-trim job makes sense when the walls are in good shape but the doors are showing age: yellowing paint, chipped edges or a colour you want to change. Older homes are common candidates — many were painted with oil-based enamel that has yellowed or become brittle, and a painter can switch to a water-based product on the doors without touching the walls.

What the job costs depends on the number of doors, their complexity (flat versus panelled), the prep required, and whether you're making a significant colour change. A change from dark to light typically needs more coats and a tinted primer. For a guide to what interior painting costs in your area, see the interior painting cost guide.

A good painter on doors gets a result that's hard to match yourself

Interior painting in Australia doesn't need a trade licence. But a clean, durable finish on doors and trim is harder to pull off than it looks — especially on panelled doors or when you're changing colour.

A licensed painter brings the right prep routine: correct sanding, the right filler and primer for the surface. They know how to avoid the problems that catch out a first attempt: drips on vertical faces, brush marks locked into the finish, paint in the hinge recesses.

It's most worth hiring someone when painting detailed or panelled doors; when doing a full room repaint and wanting the trim to match; when going from a dark colour to a much lighter one; or when the result has to look right. SureQuote connects you with vetted painters for interior doors and trim — a licensed painter will look at your doors, recommend the right product and finish, and quote the full job.