The paint tin says two coats and a light sand. What it doesn’t say is that a hollow-core door swells in a Melbourne winter, that the last painter used an oil-based enamel your new water-based paint won’t grip, or that the handle you’re about to unscrew has three layers of old paint gluing it in place. Painting internal doors is one of those jobs that looks like an afternoon project and turns into a weekend once the first coat goes on and every flaw under gloss paint shows up under hallway light.
If you’re weighing up whether to tackle it yourself or bring in interior house painters in Melbourne, this guide walks through what actually needs to happen before paint goes on, which finish holds up on a door that gets touched fifty times a day, and where DIY jobs usually go wrong.
Why Doors Take Longer Than the Rest of the Room
A door isn’t a wall with hinges. Painting internal doors properly means prepping and coating two faces, four edges and often the frame, usually in a finish that’s glossier and less forgiving than flat wall paint. That’s roughly double the surface area of a comparable wall section, in a finish that shows every roller mark and brush stroke far more readily than a low-sheen wall colour.
Doors also move. Hinges wear, old paint builds up in layers around the strike plate, and in older Melbourne homes around Fitzroy, Brunswick and Richmond, solid timber doors can swell slightly through winter humidity and sit tighter in the frame. Paint applied to a swollen door often ends up scraping against the jamb once the timber shrinks back in summer — one of the more common callbacks we see on older weatherboard and Edwardian homes.
What Actually Needs to Happen Before Any Paint Goes On
Skip this part and the paint job fails regardless of how good the topcoat is. Doors need three things before a brush goes near them: a clean surface, a sound key for the new coat to grip, and any old gloss or oil-based paint identified so the right primer gets used.
- Wipe doors down with sugar soap or a similar degreaser — hands touch door faces constantly, and grease stops paint adhering properly.
- Remove or mask hardware. Handles and hinges caked in old paint are a sign corners were cut last time.
- Fill dings and old screw holes, then let the filler cure fully before sanding back flush.
- Give the whole surface a light scuff-sand, even over paint marketed as needing none. A chemical deglosser can stand in for sanding on detailed panel doors, but it’s doing the same job: giving the new coat something to bite into.
One shortcut we’d genuinely avoid: painting straight over a door still tacky from being wiped down. Doors need to be bone dry before the first coat, not just dust-free.
Picking a Finish That Survives Fifty Touches a Day
Standard wall paint on a door usually looks fine for a few months, then marks and burnishes around the handle within a year. Doors need a purpose-built enamel — something like Dulux Aquanamel or Wattyl’s trim and door range — in a low sheen or semi-gloss finish, sometimes labelled “satin” on overseas product ranges but sold as low sheen or semi-gloss here in Australia.
Higher sheen shows more surface imperfection, so a door with old dents or a rough repair benefits from staying at low sheen rather than pushing for a glossier look. For a family home with kids and pets moving through doorways constantly, that trade-off between sheen and forgiveness usually matters more than the paint chart photo.
Primer Is the Step Everyone Wants to Skip
If the existing coat on a door is oil-based enamel — common on doors painted more than 10–15 years ago — a straight water-based topcoat over it is a recipe for peeling within months. That situation needs a shellac-based or stain-blocking primer first, something like Zinsser B-I-N, to create a surface the new water-based enamel can actually hold onto.
On timber that’s never been painted, or on doors switching from a dark colour to a lighter one, a standard acrylic primer-sealer does the job. The rule that catches people out: unless you know for certain what’s already on the door, treat it as oil-based until proven otherwise.
Not sure what’s on your doors, or dealing with more than a handful across the house? A quick painting quote in Melbourne from someone who can check the existing coat on site is usually worth it before buying tins of the wrong primer.
Brush and Roller, or Spray?
Brush and roller work fine for one or two doors painted in place, and it’s the realistic option if the doors stay hung on their hinges throughout the job. The trade-off is visible brush marks in raking light unless the painter works quickly and keeps a wet edge.
A sprayed finish looks closer to factory-smooth, which is why we usually recommend it once someone’s repainting five or more doors at once — the same logic that applies when spray painting kitchen cabinets rather than hand-finishing each one. Spraying means taking doors off their hinges and setting up in a garage or spare room, which adds time and mess most homeowners don’t plan for on a two-door job.
How Many Coats, and How Long Between Them
Most internal doors need one primer coat (where required) plus two finish coats for even coverage and a durable result — a single topcoat over bare or previously coloured timber almost always shows patchiness once it’s dry. Water-based door enamels are typically touch-dry within one to two hours and ready for a second coat after four to six, but full cure — the point where the paint film is actually hard enough to handle daily contact and hardware being reinstalled — can take up to seven days.
That cure time is the single biggest reason DIY door jobs go wrong: the paint feels dry to touch on day one, hardware goes back on, and a soft paint film gets dented or stuck to the frame before it’s had time to properly harden.
Where DIY Internal Door Painting Usually Goes Wrong
The three mistakes we see most often on jobs we’re called in to fix are rehanging hardware before the paint has cured, closing a freshly painted door against its frame overnight and finding it glued shut by morning, and skipping primer on old oil-based paint because “it looks fine to paint straight over.” Each one is avoidable with a bit of patience around drying times rather than any special skill.
If low-VOC or eco-friendly paint matters for your household — young kids, pets, or someone sensitive to strong paint odour — there are genuinely capable options now that don’t compromise on durability for doors. We’ve covered the trade-offs in more detail in our guide to low-VOC paint for Australian homes.
Related Articles
If you’re planning a broader interior repaint alongside your doors, these guides cover the related decisions:
Frequently Asked Questions
A purpose-built door and trim enamel in a low sheen or semi-gloss finish, such as Dulux Aquanamel or Wattyl's trim range. These are built to handle constant handling and cleaning far better than standard wall paint, which marks and burnishes around the handle within a year.
Clean the door with sugar soap to remove hand grease, fill any dings and let the filler cure, then give the whole surface a light scuff-sand or chemical degloss so the new coat can grip. Wipe off dust and let the door dry fully before the first coat.
You can reduce sanding with a liquid deglosser, but you can't skip surface prep entirely. Even paints marketed as needing no sanding perform better with a light scuff or a chemical degloss first — without a key, the new coat is far more likely to peel around high-contact areas.
If the existing coat is old oil-based enamel, use a shellac-based or stain-blocking primer such as Zinsser B-I-N before a water-based topcoat, or the new paint may peel. For bare timber or a colour change, a standard acrylic primer-sealer is enough. If you're unsure what's on the door, treat it as oil-based.
Usually one primer coat where required, plus two finish coats. A single topcoat over bare or previously coloured timber almost always dries patchy, especially on panel doors where the recessed sections absorb paint differently to the flat faces.
Water-based door enamels are typically touch-dry in one to two hours and ready to recoat after four to six. Full cure — when the film is hard enough for daily contact and reinstalling hardware — can take up to seven days, which is why rushing hardware back on is a common cause of damage.
Spraying gives a smoother, factory-like finish and makes sense once you're doing five or more doors, taken off their hinges and set up in a garage or spare room. For one or two doors left hung in place, brush and roller is more practical — spraying adds setup, masking and mess that isn't worth it on a small job.
Yes. Several low-VOC and low-odour door enamels are now available that hold up well without the strong solvent smell of older products — a good option for homes with young kids, pets, or anyone sensitive to paint fumes. They still need the same prep and cure time as standard enamels.
Yes, EQ Painting Solutions paints internal doors and trims across Melbourne and surrounding suburbs including Richmond, St Kilda, Brunswick, Fitzroy and Hawthorn. The easiest way to get an accurate price is a free on-site quote so we can check the existing coat and door count.
Painting internal doors properly comes down to patience more than skill — the right prep, the right primer for what’s already on the door, and enough cure time before hardware goes back on. Get those three things right and a well-chosen enamel finish holds up to daily use for years.
If you’d rather hand the doors over to someone who paints them every week, EQ Painting Solutions services Melbourne and surrounding suburbs including Richmond, St Kilda, Brunswick and Fitzroy. Call 0498 200 654 or book a free, no-obligation quote.
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