Hello anyone, recently
inherited collection with many dark toned coins. From what I gather, toned coins are appreciated but only if colorful and not too much. Many of those I've come across have seemingly "too much", very dark, some dark green and blackened even. Some have light colors that could be viewed positively I guess, but my question is for those that might be too much, is there a tarn-x or product that is suggested to remove it. The half dollars from the early 1800s in particular are all brand new except this stain issue. Can it be removed with a recommended solution?