Can I leave my brush or roller overnight without cleaning it?

For a short break, wrap the brush or roller tightly in cling wrap or a sealed plastic bag to stop it drying out — this works well overnight. However, for anything longer than a day, you should clean the tool properly. Dried paint, especially acrylic, is very difficult to remove and can permanently damage bristles or roller nap.

How do I remove dried acrylic paint from a brush?

Soak the brush in warm soapy water for 30 minutes to soften the paint, then use a brush comb to work it out from the bristles. For heavily dried paint, a small amount of methylated spirits can help loosen acrylic, but test carefully as it can damage some synthetic bristles. Prevention is always better — clean brushes as soon as you're done.

Is it worth cleaning cheap roller sleeves, or should I just throw them away?

It depends on the paint type. For water-based paints, even budget roller sleeves are worth cleaning and reusing a few times. For oil-based paints, the amount of turps required to clean a roller sleeve often makes it more practical and economical to use a disposable sleeve and replace it each time.

Can I pour dirty turpentine down the sink?

No — mineral turpentine and paint-contaminated solvents are hazardous and must never be poured down the drain or into the garden. Store used turps in a sealed container and take it to your local council's hazardous household waste facility. Many NZ councils run regular drop-off events for this purpose.

How do I know if my brush is clean enough to reuse?

Run the bristles across a piece of white paper or card. If no colour transfers, the brush is clean. Also check deep into the base of the bristles near the ferrule — paint often hides there and can cause bristles to splay over time if not fully removed.

How to Clean Paint Brushes and Rollers Properly

Cleaning your paint brushes and rollers properly after every job is one of the simplest ways to protect your investment and get better results next time. Whether you've been using a water-based acrylic or an oil-based enamel, the cleaning method is different — and doing it wrong can ruin good-quality tools quickly. Here's everything a NZ homeowner needs to know.

Know Your Paint Type First

Before you start cleaning, identify what type of paint you used. This is the most important step.

Water-based paints (acrylics, latex) — the most common type used in NZ homes today. Brands like Resene and Dulux offer extensive water-based ranges. These clean up with water.
Oil-based paints and enamels — less common now but still used for trims, doors, and high-wear surfaces. These require mineral turpentine (turps) or a dedicated brush cleaner to remove.

Check the paint tin label if you're unsure — it will tell you what solvent to use for clean-up.

Cleaning Brushes After Water-Based Paint

Act quickly — don't let the paint dry on the bristles.

Scrape off excess paint back into the tin using the edge of the tin or a scraper.
Rinse under warm running water, working the bristles with your fingers to loosen paint from the base of the ferrule (the metal band).
Add a small amount of dish soap and work it into the bristles thoroughly.
Rinse again until the water runs completely clear.
Shake out excess water, reshape the bristles, and hang the brush or lay it flat to dry. Never store a brush resting on its bristles.

Stubborn dried acrylic paint

If paint has started to dry, soak the brush in warm soapy water for 15–30 minutes before scrubbing. A brush comb (available at Mitre 10 or Bunnings) is handy for working paint out from deep in the bristles.

Cleaning Brushes After Oil-Based Paint

Oil-based clean-up requires more care and proper ventilation.

Scrape off excess paint back into the tin.
Pour a small amount of mineral turpentine into a container and work the brush through it, pressing the bristles against the sides.
Pour out the dirty turps and repeat with fresh turps until it stays relatively clear.
Wash the brush with warm water and dish soap to remove solvent residue.
Rinse, reshape, and dry as above.

Store used turps in a sealed container — solids will settle and you can often reuse the cleaner liquid. Dispose of contaminated solvent responsibly at your local council hazardous waste facility, not down the drain.

Cleaning Rollers

Rollers hold a surprising amount of paint in the nap (the fabric sleeve), so thorough cleaning takes a bit more effort.

Water-based paint rollers

Roll off excess paint onto newspaper or back into the tray.
Remove the roller sleeve from the frame.
Rinse under warm running water, squeezing and rolling the nap with your hands.
Add dish soap and continue working until the water runs clear.
Stand the sleeve upright or hang it to dry — don't rest it on the nap as it will flatten.

Oil-based paint rollers

Follow the same steps as for brushes, using mineral turps first, then soap and water. Given the amount of solvent required, it's often more economical to use a disposable roller sleeve for oil-based jobs.

Water-Based vs Oil-Based: Quick Comparison

	Water-Based Paint	Oil-Based Paint
Clean-up solvent	Warm water	Mineral turpentine
Soap needed?	Yes, dish soap	Yes, after turps
Drying time	30–60 minutes	Several hours
Ventilation needed?	Minimal	Yes — work outdoors or in a well-ventilated area
Solvent disposal	Down drain (water only)	Hazardous waste facility
Roller reusability	High	Lower — often disposable

Storing Clean Brushes and Rollers

Proper storage is just as important as cleaning.

Wrap clean, dry brushes in their original cardboard sleeve or in newspaper to hold the bristle shape.
Store brushes hanging or lying flat — never upright in a jar resting on bristles.
Keep roller sleeves stored upright or in a sealed bag to prevent dust contamination.
For short breaks between coats (a few hours), wrap brushes and rollers tightly in cling wrap or a plastic bag to prevent drying — no cleaning needed.

Disposing of Paint and Solvents Responsibly

Never pour paint or solvents down the drain or into the garden. WorkSafe NZ and your local council have guidelines on safe disposal. Many councils offer hazardous household waste drop-off days. Dried water-based paint in small amounts can go in your general rubbish, but liquid paint cannot.

When to Call a Professional

Cleaning brushes and rollers is well within any homeowner's ability. However, if you're tackling a larger painting project — particularly exterior work, multi-storey surfaces, or surfaces requiring specialist preparation — it's worth getting a qualified painter involved. A professional will also know the right products for NZ's varied climate conditions, from the humidity of Auckland to the UV intensity of Central Otago. You can find qualified local painters on tradedirectory.co.nz.