Surface Preparation第 1 / 100 题
Before repainting a previously painted, chalky exterior stucco wall, what is the FIRST thing a painter should do to ensure adhesion?
a.Apply two finish coats without priming
b.Wash the surface to remove chalk, dirt, and loose material
c.Sand the stucco smooth with 220-grit paper
d.Spray a heavy fog coat of the finish color
解析
Chalk and surface contamination prevent a new coating from bonding. Washing (often with a pressure washer or detergent solution) removes the chalky residue and dirt so the primer or paint can adhere. Painting over an unwashed chalky surface commonly leads to peeling.
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