Stand in the paint aisle and the tins all promise the same colour in four different words: flat, low sheen, semi-gloss, gloss. The words describe how much light the dried surface reflects, and that one property changes how a room looks, how the surface wears and how well it hides the wall underneath. Here is what each finish is actually for.

Flat (or matte): for ceilings

Flat paint reflects almost no light. That makes it forgiving: surface imperfections, patches and roller marks disappear instead of catching the light. It is the standard ceiling finish for exactly that reason, and it suits very low-traffic walls where a soft, modern look matters more than washability.

The trade-off is durability. Flat paint marks easily and does not love being scrubbed, so it is the wrong choice for hallways, kids' rooms and anywhere hands and bags touch walls daily.

Low sheen: the workhorse for walls

Low sheen is the most popular wall finish in Australian homes, and it earns that spot. It has a soft lustre that looks fresh rather than shiny, it washes far better than flat, and it still hides minor imperfections reasonably well. Living rooms, bedrooms and hallways are all natural low sheen territory.

If you are repainting most of a house and want one safe answer for the walls, low sheen is it.

Semi-gloss: for wet areas and trim

Semi-gloss reflects noticeably more light, and with that comes hardness and washability. It stands up to steam, splashes and regular wiping, which makes it the standard for kitchens, bathrooms and laundries. It is also a common choice for doors, architraves and skirting, where durability matters more than softness.

The catch: shine shows flaws. Semi-gloss on an uneven wall advertises every dent and patch. It belongs on sound surfaces - which is why preparation matters even more before a higher-sheen finish.

Gloss and full gloss: for detail work

Gloss is the hardest, shiniest finish, reserved for trim, doors and feature work where you want crisp lines and maximum durability. Front doors, window frames and furniture-style joinery suit it. Full gloss on a large wall is almost never right - it turns every surface wave into a highlight - but on the right details it looks sharp for years.

Exterior finishes

Exterior paints come in similar sheen levels, but the choice is more about the surface than the look. Low sheen is the common exterior wall finish: it sheds dirt better than flat and does not glare. Gloss and semi-gloss are typical on trim, fascia, gutters and doors, where hardness and easy cleaning matter.

Two mistakes to avoid

The first is choosing finish by colour card alone. The same colour looks different in every sheen, so test the actual finish on the actual wall.

The second is mixing sheens accidentally. Touching up a low sheen wall with semi-gloss - even in the identical colour - leaves a shiny patch that reads as a stain. Keep records of what went on each surface, or ask your painter to note it.

The short version

Ceilings: flat. Walls: low sheen. Kitchens, bathrooms and trim: semi-gloss. Doors and detail: gloss. Exteriors: low sheen walls, harder finishes on trim. Choose for the room's wear, not just its look, and your paint job will still look right years later.

Not sure which finish suits which room? Prime Painting Experts talks it through as part of every quote. Call 0420 596 677.