Interior Doors: Spray or Brush?
By Lemoon's Painting
Spray or brush depends on the door. Louvered, bifold and heavily molded doors almost always come out better sprayed, off the hinges and laid flat or hung on a rack. Flat slab doors can go either way. A wood panel door is often brushed to show a fine, even grain. Your preference comes first, and the decision is made door by door.
An interior door is the surface people look at closest and touch most often, after the stair rail. It is a hand’s width from your face every time you open it, and light from the window catches it at an angle that shows every ridge and drip. That is why the question homeowners ask about doors is not usually which color, but whether it will be sprayed or brushed and whether it has to come off its hinges.
The honest answer is that it depends on the door. The general method for painting trim and a panel door is covered in painting trim, baseboards and doors. Here the question is narrower: which application suits each kind of door, and how a spray job on doors is actually set up.
Which doors should be sprayed?
Doors with many small surfaces, edges and slots: louvered doors, bifold closet doors, doors with deep molded profiles, and French doors with many glass panes. A brush struggles to reach into every slat and corner without leaving drips and heavy edges. Sprayed off the hinges, laid flat or hung, they come out even. Plain slab doors and wood panel doors can go either way.
The kinds of doors in most San Diego homes
| Door type | Common in | Usual approach |
|---|---|---|
| Hollow-core molded panel | Many tract homes from the 1980s on | Spray or brush; light scuff only |
| Flat slab, hollow-core | 1960s and 70s tracts | Spray, or fine roller tipped with a brush |
| Solid wood panel | Older and custom homes | Often brushed; spray if preferred |
| Louvered | Closets, laundries, water heater closets | Spray, off the hinges |
| Bifold | Bedroom and hall closets | Spray, off the track |
| French door with glass | Studies, dining rooms, patios | Spray with masked glass, or careful brush |
Much of the tract housing in Chula Vista and Santee has flat slab or molded hollow-core doors, while the newer homes in Eastlake and Otay Ranch often have molded two- or six-panel doors. Each has a sensible method.
Hollow-core and molded doors
Most builder doors are hollow-core with a thin hardboard or MDF face. They paint well, but that face is thin. Heavy sanding, especially over the raised edges of a molded panel, can cut straight through it to the fiber underneath, which then raises and fuzzes under paint. The right preparation is cleaning, a light scuff with a fine abrasive pad, and a primer suited to the surface. Dents and gouges in these doors are filled carefully, because the face cannot be sanded flush the way solid wood can.
Louvered and bifold doors
These are where spraying earns its place. A louvered door can have dozens of slats, each with two faces and two edges, angled so a brush has to be worked into each gap. Brushed, it takes a long time and almost always leaves drips at the bottom of the slats and paint build-up in the corners. Sprayed, with the door off and the slats coated from both sides at the right angles, the finish is thin and even. Bifold doors come off their tracks, and the pivots and hardware are removed or masked so the doors still fold freely when they go back.
French doors and glass
Doors with glass panes can be sprayed with every pane masked, or brushed with a sash brush, cutting the paint a hair onto the glass to seal the joint. Spraying gives a more uniform finish on the muntins; brushing avoids the masking and suits a single door. Either way, the glass is cleaned and any old paint on it is scraped off at the end.
How a door spray setup works
- Each door is numbered with its room and which way it hangs, usually on the hinge edge under where the hinge sits, so it goes back exactly where it came from.
- Hardware comes off and is bagged and labeled by door. Hinges, latches and strike plates are not painted.
- A spray area is set up, often in the garage, with the floor covered, walls and cars protected, and ventilation managed.
- Doors are cleaned, scuffed and primed as their surface needs.
- Doors are sprayed on racks or stands that let both faces and all edges be reached, then left to dry undisturbed.
- Doors go back once the enamel is firm enough to handle, and they are left slightly ajar at first so the edge does not stick to the stop.
In a hot inland garage in Santee in summer, the enamel can set too soon to level properly, so spraying moves to the cooler part of the day. Near the coast, damp mornings slow everything down. The label’s temperature and humidity ranges decide the timing.
When brushing is the right choice
A solid wood panel door that has been brushed for decades sometimes looks best brushed again, with the fine, even brush texture following the grain of each rail and stile. Brushing also suits a home where only a couple of doors are being painted, or where there is no good place to spray. A good brushed door is laid on with a quality brush, in thin coats, with the enamel given time to level between strokes. Both Dunn-Edwards and Sherwin-Williams make waterborne door and trim enamels that level well under a brush.
Your preference first
Some people love the look of a sprayed door; others prefer the hand-brushed texture they grew up with. Ebenezer decides spray or brush job by job, with your preference first, and he will tell you what each door you have will look like either way. Find out more about interior painting, or ask for a free estimate and walk your doors with him.
Common questions
Is a sprayed door better than a brushed one?
Not better, different. A sprayed door has a smooth, factory-like finish with no brush marks. A well-brushed door has a fine, even texture that many people like, especially on wood panel doors. Both last equally well when the preparation and the enamel are right. It comes down to the door and the look you prefer.
Where are doors sprayed if not inside the house?
Usually in the garage or a covered outdoor area, set up as a temporary spray space with the floor and walls protected and the doors hung or laid on racks. Spraying inside a lived-in house needs heavy masking and ventilation, so moving the doors out is often the better choice.
How long are the doors off the hinges?
Long enough for the coats to dry and for the enamel to be firm enough to handle and rehang without marking, which depends on the product, the temperature and the humidity. On a damp coastal day that is longer. The order can be planned so that the rooms that need privacy, such as bedrooms and bathrooms, get their doors back first.
Can hollow-core doors be painted?
Yes. Most builder interior doors are hollow-core with a molded hardboard or MDF face, and they paint well with the right primer. The thing to avoid is heavy sanding, which can cut through the thin factory face. A light scuff, a good primer and thin coats are the right approach.