I work mostly with gold and do not have much experience or luck soldering
i haven’t worked in silver recently, but dave sebaste post brought alot of
memories back. he gave some good advice.
it jogged my dim memory that if all you have is that soft(unknown) solder,
you can forgo pallion soldering. the pitting is occurring where the
pallions were, right? snip a long piece of solder from your sheet and hold
it in a pin vice or whatever, heat the workpiece up to solder temp and
apply the solder to the piece and feed the solder into the join. possibly
you could feeed the solder from one place and cause the solder to flow
thruout. hold your flame in front of the solder to lead it thru the join.
hope this makes sense in print.