spruce up

verb

1. To dress or arrange smartly, elegantly, and neatly; to smarten.
2. To refresh, revamp; to freshen or improve something, especially its appearance.

   “Fresh paint and some new curtains would do a lot to spruce up this dark room.”

   “Hu Yaobang was officially rehabilitated on the ninetieth anniversary of his birth in 2005 and his mausoleum in China Youth League City (Gongqingcheng) in Jiangxi province was spruced up.”