oil is what ya found. new cosmoline most likely. i think the do an arsenal style hot dip but that may or may not be the method, but opening up that plastic bag and the whole thing a greasy mess aint fun.
on a side note, what is the production rate at pietta? you know it takes half an hour to do a detail strip and clean and reassamble when you fire your revolver, do you think theyd pay 100 people to clean 1000 guns a day total when teh proof house in theory can most likely proof 3000 a day? after all proofing is simply load it with a proof charge, cap it, put it in a vise, and fire it.