We recently had some parts E-Nickel plated by a somewhat new supplier. Part of these parts had to be masked prior to plating. It seems that the supplier did not see the need to oil these parts after processing and removing the masking so the unplated section of the parts rusted before we got them back and unboxed them. I cost us over 6 hours rework time to fix these parts. The supplier tells me we should have "told them" to oil them if we wanted that done. I said it only makes common sense to oil a part after doing this to prevent it from rusting. Could I please have everyone's input on this?