Not all paints are the same. The big differences usually come down to solids content, coverage, durability, and how well the paint holds up over time, especially externally. Cheaper paints often need more coats, mark more easily, and don’t weather as well, which can wipe out any upfront savings pretty quickly.

For your situation (full reno, plasterboard inside, weatherboards outside, not a quick flip), your thinking makes sense. Dulux Wash & Wear internally is a solid choice—easy to clean, good coverage, and holds up well in lived-in homes. Externally, Dulux Weathershield is proven in Australian conditions and does perform better with UV, moisture, and movement in timber boards.

The Dulux Trade range is a reasonable middle ground if you’re getting it at proper trade pricing. It’s not junk by any means, but it’s designed more for volume work where cost control matters. The premium lines mainly give you better durability and finish longevity, which aligns with what you’re trying to achieve.

One important thing people often miss: the painter matters as much as the paint. Surface prep, correct undercoats, and not over-thinning make a bigger difference than brand alone. If your relo tends to water paint down heavily and rush coats, even the best paint won’t look great.