brushup

[ bruhsh-uhp ]
/ ˈbrʌʃˌʌp /

noun

the act or process of reviewing a subject, technique, or the like, for the purpose of renewing the memory, skill, etc.: He gave his Spanish a brushup before his trip to Mexico.
the act or process of eliminating or repairing minor flaws: He gave the collection a final brushup before putting it on display.

Origin of brushup

First recorded in 1895–1900; noun use of verb phrase brush up
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019