Surface Preparation第 17 / 100 题
What is the main reason to remove dust after sanding and before painting?
a.Dust improves paint flow
b.Dust left on the surface prevents proper adhesion and creates a gritty finish
c.Dust changes the sheen of the paint can
d.It is only an aesthetic preference with no effect on adhesion
解析
Sanding dust acts as a contaminant that keeps paint from bonding and leaves a rough, gritty film. Wiping with a tack cloth, vacuuming, or damp-wiping removes the dust for a clean bond and smooth finish. This step is part of preparing a clean, sound surface.
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