I have never cleaned them up because the wife doesn't care for them, or if it would be the thing to do. The decorations are very intricate and very neat looking. I don't do plastic.You will like these, great condition, a little heavy, but really interesting to look at. The item "French Victorian Bronze and Marble Fireplace Urns" is in sale since Sunday, September 27, 2015. This item is in the category "Antiques\Home & Hearth\Hearth Ware". The seller is "putoutfire2003" and is located in Winnsboro, South Carolina. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, South africa, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Bahamas, Viet nam, Uruguay, China, Thailand, Sri lanka, Russian federation.