Wiktionary
buff out
vb. 1 (context transitive English) To remove paint or light scratches from the surface by friction, wearing it out by polishing or blasting with sand or by employing some similar method. 2 (context transitive idiomatic English) to bring something to proper shape by removing or masking minor defects, by straightening out the residual shortcomings.
Usage examples of "buff out".
Maybe he figured because he stood behind a counter, he didn't need to buff out anything below his waist.