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Preparing Walls for Painting: Problem Walls
Asked May 12, 2017 by a homeowner in Handyman (Cathy Katyang)
Minor wall flaws are often hard to spot—until the afternoon sun hits them and makes them embarrassingly obvious. Find and mark any imperfections in the walls. Start by turning off all the lights in the room and closing the curtains. Then hold a trouble light next to the wall and move it across the surface (a process called “raking”).