Rhodium

This may seem like a strange request given it does not deal with
jewelry but I’m hoping for some insight, suggestions or possible
references. I am in the process of researching the feasibility
of somehow coating rhodium on a conical copper surface. The
surface area is approximately 100 sq. cm. and with require 2
grams of rhodium. The resulting surface thickness is roughly 1
mil. The methods I have explored include sputtering and
electroplating with little promise. If you can help I would
greatly appreciate it

Wow John, you’d better have some dough. I assume the
measurement “mil.” you used refers to mm (millimeter). To the
best of my knowledge the only way to accomplish this would be
through plating, but you will only have a thickness of several
microns. You would also need some serious amps to plate
something that large! So…are you making a bra for Madonna, or
what? Mike

Wow John, you’d better have some dough. I assume the
measurement “mil.” you used refers to mm (millimeter).
Mike

Just for clarification, let me point out that 1 mil is
equivalent to 0.0254 mm. Scott

 Just for clarification, let me point out that 1 mil is
 equivalent to 0.0254 mm. Scott

Or 1/1000" (.001").