Hi David, In answer to your first question, I don't think that the vertigris will leech to the new parts however, I generally clean all rails back to their natural state when installing new action parts. You have a much bigger problem with the splitting rails. They need replacing or get a new stack for that model! I recommend rail replacement. If you are not comfortable with retrofitting them yourself you can have the new rails soldered in by a subcontractor. There are several on the list and advertise in the PTG Journal. Good Luck, Dale Whitehead
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