Tumbling Disaster Resolved!

As horrible as the word is it seems that my steel shot had become contaminated.  Once the shot was completely cleaned in the baking soda solution (see link from earlier post) I successfully tumbled a scrap piece of silver this morning and it came out sparking clean.  I also contacted Metalliferous for the correct usage of Oakite #3 which is the compound that I use in my steel shot.  The responded with A couple of spoonfuls per batch. Enough water to cover the shot. If the mix turns gray, add more Oakite and keep tumbling.