1) Artistic language 2) Buff 3) Burnish 4) Decorate 5) Flush 6) French word used in English 7) Make like new 8) Polish 9) Polish and make shiny 10) Shine 11) Smooth 12) Smoothen 13) To polish 14) To polish or burnish 15) To renovate or recondition Found on https://www.crosswordclues.com/clue/furbish
to restore to freshness of appearance or good condition (often fol. by up): to furbish a run-down neighborhood; to furbish up one's command of a foreign language. · to polish. Found on https://www.infoplease.com/dictionary/furbish