Hello, The support issue seems sufficiant. I personally use
vermiculate to support inside and outside the hollow form.
Now for the gold issue. Usually you construct the gold pmc component
first. Fire it. Then construct the silver pmc and add the gold
component at this time.
I do not believe that the gold pmc slip is the way to add the gold.
I would fire the silver pmc structure and then use a kuembo gold
application to the surface.
At this time I have added many gold (of different colors and Karats)
to the silver pmc + and fired them together… with success. They do
turn black on the surface. A little sunding takes care of the black
as you might anticipate. When initially constructing and placing the
gold elements into the pmc + I treat it like I would a cz and make
sure that the gold element is secularly ancorded into the base. I do
not rely on the two metals fusing. (Maybe they do fuse, I just don’t
know so I don’t count on it happening.)