Conventional spray systems are used to spray fine finishes. Learn how to set up and spray using a pot and compressor
HVLP Spray-guns are High Volume Low Pressure Spray-Guns. Learn how to set up, operate and shut down a HVLP
How to set up an airless spray-gun.
Back-rolling and Airless Spraying
According to the AS/NZ Guide to Painting of Buildings;
"For airless spray application pressure is used to force paint through a fine orifice causing the paint to atomize into very fine droplets. No air is added to the paint. The method provides speed and the ability to atomize a wide variety of coatings and gives a smoother and more uniform coat compared with brushing and rolling. Overspray and paint bounce-back need management.
For broad-wall and ceiling areas, in critical light conditions, airless spray application should be back-rolled. Back rolling should occur whilst the paint film is still wet using a paint roller charged with paint then expelled. Do not commence back-rolling with a dry roller.
For plaster jointed substrates such as paper faced plaster boards or fibre cement sheet that are coated by spray application back rolling or sanding of the first seal coat is highly recommended and back rolling of the final top coat is recommended."