On Sep 5, 4:19 pm, F. George McDuffee gmcduf...@mcduffee-
associates.us wrote:
...
For a one off consider lost foam casting. You make up the part
in styrafoam or urathane foam, and the runners, pack sand around
it, vent with wire or soda straws and pour in the metal. The
foam flashes and burns out. You can coat the foam with a
refactory for an even better finish.
or you can buy Lindsays pattern making books [lots of work for a
one-off]

The other Lindsay casting books are very good. I like Chastain.

http://lindsaybks.com/bks7/chas1/ind...as2/index.html

The Navy casting manual that Lindsay sells is also very good.http://lindsaybks.com/bks/foundry/index.html

Unka' George [George McDuffee]

You might want to show them the pattern with sprues and vents first.
Lots to go wrong there.

jw

jw