I use 22k gold granules, mainly for more color contrast with the AS
silver. Sand the surface of the AS silver (400-grit, then 600-grit)
just before placing the granules because any germanium oxide build
up that may be on the surface inhibits surface flow.
I use water, My-T-Flux and Klyr-Fire organic glue. This glue burns
In a darkened room, torch the silver until the silver surface flows
next to the gold granules. Avoid heating directly on the gold
granules or silver will flow up and over them (my first experience).
If your design doesn't allow you to avoid direct heat to the gold,
do just one surface flow pass over your piece, air cool, then
carefully paint whiteout over the gold granules. Resume fusing one
or two more times (i.e., flow the surface, stop for three seconds,
flow the surface again). Much beyond this is unnecessary and the
gold will begin to collapse.
Air cool, pickle, and test the fuse with a toothpick. Remove the
whiteout with a soft brush and lacquer solvent. Yellow ochre also
works as a resist but it is more difficult to remove.
Hope this helps.