This burnishing compound is so effective when using a magnetic or vibratory tumbler, we use it here in our factory.  The lubricating additives are specially formulated for high speed burnishing, which will create a polished finish to silver, gold, platinum, rhodium, and other precious metals.  Since you only need a small amount for each job, this gallon will last you throughout the year. Order your compound today at Stuller.com/tools.