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Are you thinking coating the existing frame in resin or doing a
total replacement? I doubt that a coating would do much except
cause fitting up problems. ?As for replacement, I think that might
be a possibility. If you catch a suspect piece soon enough, before
it swells, warps, or just breaks, you might be able to get a good
mold from it. Sort of depends on how complex the part. If you can
manage a one piece mold, great. Two part still possible. Beyond
that would be difficult, I think.
Then choosing the casting material and method. A vacuum casting
to minimize bubbles might be best for a home job. I would think,
probably wrongly, that a metal containing epoxy resin would be
best for rigidity. That is what a frame is for, strength.
Devcon steel would be good, I guess. There is an aluminum sort,
called what, Alumilite or such. Might be strong enough but with
less weight. But the aluminium might flow better and give a better
casting. I haven't done much myself so I'm guessing here.
Certainly would be worth looking into for irreplaceable favorites.
I doubt that I'll run out of Mantua mikado parts.
Chuck Peck

--- In yardbirdtrains@..., "Denis Long" wrote:
>
> Chuck,
>
> Oh Boy! ?Zinc rot again. ?I coated my Arbour valve linkages & rods with CA.
> Don't know if it will work, but at 74 years, it doesn't have to last too
> long.
>
> When last I ran the H8, she did OK, and with sound!
>
> What about doing the zinc frame in a resin casting?
>
> Denis
>




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