Paul,

What type of varnish or shellac should I use on this? part is  finished
except for trimming the outer ring off by hand and filling a few  knot holes.

Larry

You can still buy shellac and shellac is the traditional stuff.
There may be something better out there since 1947 but I do not know
what that would be. Three coats of shellac are called out with  fine sanding
between coats. Then waxing is called out.

That pattern looks wonderful Larry. I am sure a lot of people
will join me in thanking you for this wonderful effort.

You have done a great service to the cause of furthering rotary  engines
in aircraft.
-- 
Paul Lamar ...No rotor no motor.

Paul,
Coat it with Epoxy, first coat diluted with Acetone.
George ( down under)

Does it ball up on you?

I like the idea because it can add a lot of strength.
Especially if a layer of four ounce glass cloth is added. Four  ounce, for those
of you that have not experienced it, is like thin silk.

I am inclined not to do it this go around as we want to try the  pattern out
as soon as possible. Extra time and labor.

Paul Lamar ...No rotor no motor.

If you decide to go with epoxy, straight WEST, is an excellent
sealer.  No need to cut it at all.  I have a lot of practice sealing
wood boats.  Also urethane varnish is very easy to apply.    Jerry


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