"Matty F" wrote in message
...
Apart from mending broken glasses and suchlike, you can make quite big
things using epoxy resin and a mould made from bits of old plastic
pipe:

http://i42.tinypic.com/mkdx0k.jpg

That's the old insulator on the right.

The epoxy turns up nicely on a lathe as long as you don't add silica
or anything that blunts metal tools.

If you don't add some glass filler it doesn't last long if its subject to
vibration IME.
I am talking about stuff with a design life of 20+ years though.