Will, Palladium can easily be cast in place...but with one small
problem: palladium LOVES to oxidize! It will not come off in the
pickle, so you will be stuck with a black wire that is impossible to
solder, should you wish to have a very tight bond. When you file it
flush to the surface of the cast metal, it will look white, like
Perhaps you can use this to your advantage, by creating a way to
lock the wires into the casting. Just putting a crimp in the wire
(that is imbedded in the wax) will do the trick. File the wires
flush after casting and heat the whole piece until the palladium
oxidizes. Now, you have black "dots" on the surface of your casting,
instead of white ones. Flat wire will give you black "lines," etc.
I think that the beauty of casting platinum in place is that you can
pre-polish the platinum, and it will remain polished after the cast.
This can give you some interesting texture contrasts...
Try everything...platinum, palladium, copper, steel, titanium,
pebbles, whatever. Try glass, if you wish. The worst that can happen
is that the glass shatters, and tiny bits of colored glass are
sticking out of the cast metal. Practice with a silver test cast.
You may discover something the world has overlooked...