SkillsUSA Automotive Refinishing Technology Practice Test

Which term describes the process of roughening a surface to improve adhesion?

Fisheyes Scuffing / Deglossing Runs / Sags Featheredge

Correct Answer:

Scuffing / Deglossing

Explanation:

Roughening a surface to improve adhesion is scuffing or deglossing. The idea is to disrupt the smooth, glossy layer so the next coat can grip better. Scuffing mechanically abrades the surface to create a uniform, tiny texture, while deglossing removes the gloss layer to lower surface energy and help bonding. This is about preparation for adhesion, not fixing defects or shaping edges. For contrast, fisheyes are pits from contaminants, runs or sags are excess paint that drips or sags, and featheredge refers to blending the paint at a panel edge.

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