however, when I return the pieces to the tumbler to burnish the
silver using mixed stainless shot and Rio deburring solution...
there seems to be a chemical or electrical reaction occurring that
is causing oxidation on the surface of the silver on testing the
solution after tumbling I get an approximate PH of 8
I'm not sure this is the issue but part of your above statement
caught my attention. You stated your using deburring solution with
steel shot? Don't, it's simply not effective. Deburring solution is
engineered for abrasive media, not burnishing media. Burnishing is a
non abrasive step so use a burnishing compound, you should see much
I hope this helps.
Rio Grande Technical Support.