To brush up

to paint, or make clean or bright with a brush; to cleanse or improve; to renew.

See also: Brush

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
UAECe residents are being urged to brush up on their dental hygiene.
FAMILIES will be able to brush up on their health knowledge when mobile dental vans are rolled out in Chelmsley Wood.
FAMILIES will be able to brush up on their health knowledge when special mobile dental vans are rolled out in Solihull.