Almost anything is possible if you throw enough money at it. They
could be solid brass laquered or die cast zinc alloy either brass
plated or even gold.
So before you decide on doing anything you need to establish what
they are made from.
The best way to do that is to find someone that had a metal working
workshop with a proper polising set up where he can give them a
tickle on his polisher to get back to the base metal.
Once youve done that, then you get back to us here and we can advise
the various options open to you.
gold plating is the final option and the most expensive, given the
price of gold today.
also you will need to have a quote as to the no of microns of gold
you want to have put on.
They will need to be repolished before any plating takes place. Brass
plating is not your normal run of the mill plating shop work. Can be
done but not easy to find anyone willing to take on such a small job.
Have you tried getting back to the furniture maker to ask if they
can get them done for you?
A nice letter might just twist ther arm into doing something!!