In article ,
says...

I've heard of silver solder in a paste but not brass. Was this a *home
made* concoction, if so do you recall what was used for the paste flux
(all I know of is the powdered stuff) ?

I use a blue paste flux with brass, made by GasFlux. It's around $10 for
a 1-lb tub, I get mine from www.henryjames.com.

--
is Joshua Putnam
http://www.phred.org/~josh/
Braze your own bicycle frames. See
http://www.phred.org/~josh/build/build.html