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If it were me, I'd dry fit all the pieces making sure where they will fit. Then use Epoxy to carefully glue it back together. Smooth it down to the surface. Then let it cure. Then put down a bed of Epoxy and take some fiberglass cloth and press down into the glue. I would only use the fiberglass cloth on a non-visible area and make sure that it is low enough that the Mask will still fit in the TV cabinet.
If there are any voids from missing pieces, etc, I'd use some bondo and/or fiberglass cloth and carefully smooth it out before it dries. Then if it looks "patchy", paint the mask.
I bet you can make it look as good as new. Restoring these old TVs sometimes requires ingenuity that you didn't originally anticipate.
Hey, I've got a 19" Zenith Porthole and it has cracks in the mask that I am going to address when I pull the chassis again. When you get your Porthole playing, I think you will find that 19" CRT makes a pretty good size viewing surface. These Zenith Portholes make wonderful TVs and are very collectible.
Carl
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CW
1950 Zenith Porthole - "Lincoln"
Last edited by cwmoser; 04-29-2012 at 06:42 AM.
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