Interior Painting in Adelaide: The Preparation Steps Most Painters Skip

Interior painting jobs look straightforward until you’re six months down the track and the paint is cracking along the cornice joins, there’s a shadow of the old colour bleeding through the new one, or the finish on the feature wall looks patchy in different lighting conditions. These aren’t random outcomes. They’re the predictable result of skipped preparation steps.

Here’s what proper interior preparation actually looks like — and why it makes up the majority of a well-done job.

Filling and Sanding: The Step Most Rushed

Every interior wall accumulates imperfections over years of occupation: nail holes, minor dents, hairline cracks around door frames and at cornice joints, small areas of damage from furniture. Before any paint goes on, every imperfection should be filled with appropriate flexible filler, allowed to dry fully, and sanded back flush with the surrounding surface.

This sounds simple. In practice, it takes time — especially on older Adelaide homes where plaster walls may have settled, where previous renovations have left mismatched surfaces, or where damp has caused localised damage that needs addressing before painting over it. Painters who skip or rush this step are visible the moment the first topcoat goes on and the imperfections show through.

Washing Walls Before Painting

Paint does not bond well to dirty surfaces. Kitchen walls accumulate grease over years. Bathroom walls develop mould in areas of poor ventilation. Children’s rooms gather crayon, marker, and a dozen unidentified substances at hand height. These surfaces need to be cleaned — genuinely cleaned, not wiped with a damp cloth — before painting.

Mould is particularly important to treat correctly. Painting over active mould with standard interior paint creates a situation where the mould continues growing behind the new coat and reappears within weeks. Mould-affected surfaces need to be treated with appropriate fungicidal wash, allowed to dry completely, and in persistent cases, primed with a mould-inhibiting primer before topcoats are applied.

Protecting What Isn’t Being Painted

Experienced interior painters take drop sheets seriously. Floors, furniture that can’t be moved, built-in cabinetry, light fittings, and power points all need protection. The quality of the masking — particularly around cornices, skirtings, and window frames — determines whether the finished job looks professional or looks like it was done quickly.

Good masking tape applied neatly, removed at the right moment while the paint is still slightly tacky (not after it’s fully cured and liable to peel), and replaced if it lifts during the job is a detail that separates professional painters from people who paint houses.

Priming: When It’s Required and When It’s Not

Not every interior paint job requires a separate primer coat. Where a surface is stable, well-adhered, and close in colour to the new coat, a quality paint applied at the correct spread rate may be sufficient in two topcoat passes. Where priming is genuinely needed — fresh plaster, significant colour changes (particularly light over dark), repaired areas — using a dedicated primer coat before the topcoats makes a measurable difference to the result.

Painting four topcoats over a difficult colour change to avoid buying a primer is a false economy in both product cost and time. It’s also visible in the result. Fresh plaster needs a mist coat — a thinned first application — to seal the suction before a full-strength coat is applied. Skipping this causes the paint to be absorbed unevenly and produces a patchy finish that no number of subsequent coats will fully correct.

Colour Advice: Samples in the Actual Space

Paint colours look different in the shop, on a phone screen, and in the room they’ll actually live in — different light conditions, different ceiling heights, different floor colours all shift how a wall colour reads. We always recommend painting a sample patch of at least 30cm square in the actual space and looking at it across different times of day before committing.

The north-facing living room that gets afternoon sun will read a neutral very differently to the south-facing bedroom that mostly sees indirect light. This matters especially with whites and off-whites, where the undertones in a colour can flip from warm to cold depending on the light.

➤ Brighto Painting handles interior repaints across Adelaide — single rooms through to full-house projects. If you’d like a quote with a proper scope of preparation included, get in touch and we’ll come out to assess.