Plating will not survive soldering but gold fill will. BTW there is
18k and 22k bi-metal (fancy term for gold fill) has a thicker gold
layer than the gold fill you are using with a better color and is
on a sterling substrate.
I just caught this part of the thread... and remembered an old trick
we used at one shop, used while fabricating Native American style
jewelry (rings, bracelets, watch tips, etc.) from gold filled stock.
Done right, it allowed us to do minimum polishing to the pieces, and
we got perfect results from using just the final polish with rouge.
The trick was to keep everything drowned in flux so that fire scale
was never allowed to form. It took some fussing, from having things
from the extra fluxing(s) to moving the puddles of molten flux around
to cover exposed areas, but it sure made buffing a breeze.
Now that I'm thinking about this -I worked there around 1977 - we
also went to great lengths to keep from sctatching, scuffing, or
marring the GF during fabrication too. Lacking nylon anvils,
mandrels, pliers, etc., there was a lot of leather and masking tape
used to cover the steel surfaces of these items.
Then the boss also made us cover up the ends of wire stock, and the
shot balls made by melting bits of scrap, with a dab of 8k solder.
Then the rouge, and off to the platers. That way, a maximum of gold
contenet was retained, and the stuff would wear longer than slap-dash
competitors' products before the copper base started to show through.
A brief excerpt from my former life as a metalsmith /modelmaker...