Yes, you can spray Dulux Weathershield masonry paint. Below are guidelines for spraying Dulux Weathershield Smooth Masonry Paint. Conventional Spray: Satisfactory through most equipment. Thinning: Normal use (not to be exceeded): Add up to 1 part clean water to 2.5 parts paint.

Here's how to thin latex paint so it can be used in a spray gun. Materials you will need: Here's what you do: Pour the paint into the bucket. Add ½ cup (118 milliliters) of water for every gallon of paint. Mix thoroughly. Check the thickness by running the paint through a funnel.

To thin down emulsion ready for spraying, the best ratio is 70/30. That is 70% of paint and 30% water. Some painters prefer an 80/20 ratio, but this greatly depends on the paint you are using and how thick it was, to begin with.