Tarnex solution

Peter, I have a chain (spiral rope) which became extremely
tarnished and is not responding to my normal treatment of Tarnex
or any other dip-n-rinse solution. Will your homemade formula
work for it? Any other suggestions? I’ve tried putting this type
of chain in a vibrating tumbler with the toroidal action. It
worked the chain into a lump–so not going there again with this
method for this type of chain, flex and French rope. Thanks in
advance. K.P.