[header] How to clean platinum [title] Purchase a cleansing solution for platinum or fine jewelry. [step] There are several products available which are made for cleaning fine metals and jewelry. These contain polymers which buff out small blemishes in your platinum while being gentle enough not to damage the metal. 
Consult your local jeweler about which cleansers he would recommend. [substeps] You can also use warm water and mild soap if the platinum is not terribly tarnished.