During the past 20 years a growing number of archaeologists have focused their investigations on contact and early historic-era sites in the New World. Frequently the most difficult aspect of these studies is the accurate identification of a site's age, function, and cultural affiliation from recovered material remains. Concurrent with this research has been an increasing concern for the conservation and preservation of the fragile objects recovered from these sites. One of the most important classes of artifacts for the dating and cultural identification of sites are coins. In this study we review a variety of nondestructive surface-enhancement techniques that were undertaken for the detailed examination of worn coins recovered from the seventeenth-century Marquette Mission site in Michigan's Upper Peninsula.