Yes Wayne, if he is still up to it, was the only one I know of.
Depending on the type of mirror, you may find it more cost effective, and get improved quality as well, by simply buying a new mirror.
If it's a standard Newt mirror you can buy excellent GSO mirrors from Bintel and Andrews. I have used 10" f5 GSO primary in a scope I built, very happy.
GD
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