Ive got a common legeica, but I want the silver colour, its lovely with the revamp, but atm, I've got an overlay on him, if I use a silver elixir what will happen? ideally he will keep his overlay but be silver underneath? thanks for any help guys.

yes, the overlay will remain, but you can always unassign or change it here.

Yes. Changing his colour with an elixir will not affect the overlay at all

Thank you both.