Stacie Florer had a great tute on LOS but had to take it off her site due to not so nice comments. You can check my blog, I do the "egg" method and regular Liver of Sulfur. It's really quite easy. Dissolve a pea sized piece of LOS (got mine from Monsterslayer, small jar under $3) in hot tap water ina glass jar. After it dissolves start dipping your metal piece until you reach the desired dark color, usually black or blue-black. I then just add more water, pour some out until all is gone from the jar. Make sure to rinse your pieces well. Then take 0000 (very fine) steel wool and remove the oxidation off the high spots to where you are satisfied. I tumble the pieces to polish them. I show pics of copper straight the roll, oxidized copper, and the finished piece. The reason I have written all this is that I did the regular search thing with no results, and I think Stacie also removed the link from the forum here.