english
1
general::
Phrase(s): touch something up to fix up the minor flaws in something; to repair a paint job on something. • It’s only a little scratch in the finish. We can touch it up easily. • Tom touched up the scrape with a little paint.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Make minor changes or improvements, as in This wall needs some touching up but not complete repainting. [Early 1700s]
American Heritage Idioms