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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