- Not maintaining a wet edge during application
- Using low-solids or poor-quality paint
- Painting over an unprimed, porous surface that absorbs paint unevenly
Causes:
RECOMMENDED SOLUTIONS
- Always maintain a wet edge. Start near a corner and work in small sections from wet to dry.
- Don’t pause mid-wall — lap marks often form where application was stopped and restarted.
- Prime first when painting over porous or patchy surfaces to ensure consistent absorption.
