Painting Application Methods and Equipment
Painting Application Methods and Equipment
This domain tests brush, roller, pad and conventional spray application, with emphasis on technique and equipment selection. Questions often describe a surface and ask which applicator or sequence is correct.
Methods and rules
- Brushing: work the paint into the surface, then lay off in one direction with light strokes. Do not over-brush as the film starts to set.
- Cutting in: paint the edges and corners first with a cutting-in brush, then fill the main area while the edge is still wet.
- Rollering: load the sleeve evenly, roll in a W pattern, then finish in one direction. Nap length controls finish and paint pick-up.
- Pad application: useful for broad flat areas and quick maintenance work; keep the pad edge clean.
- Conventional spray is covered in the spray domain, but here remember that spraying is a separate skill with its own controls.
Equipment selection
- Smooth plaster takes a short nap, about 6–12 mm; rough masonry takes 18–25 mm so the sleeve reaches the profile.
- A sash brush is chosen for narrow glazing bars; a wide flat brush for large flat panels.
- Use a paint kettle with a strainer to remove skins.
Worked example
A wall is smooth, previously painted plaster and is to receive emulsion. A 9 mm microfibre sleeve gives a fine finish and good release. A 25 mm masonry sleeve would hold more paint but leave a stippled texture and consume extra material. The reasoning is that nap length must match surface roughness, not just coverage speed.
Traps
- Rolling with a dry sleeve, which leaves a roller texture and bubbles.
- Cutting in too far ahead so the edge dries before the main area is painted.
- Over-brushing fast-drying paint, which causes brush marks and laps.
- Using a dirty kettle or strainer and contaminating the paint.