retone

It has begun to naturally retone, or some of its natural toning survived a relatively recent dipping episode, or it has some combination of new and old toning.

Three 1876-CC Twenty Cent Coins Sell in Spring 2009; Less than Twenty are Known! (Part 2 – Rarity, Quality & Condition Rankings) : Coin Collecting News 2009

Other varieties of a little light legerdemain can retone a room so well that major decorating is unnecessary.

Weddings Valentine Style Diann Valentine 2006