Annette, You quench in water, then wash it (a little ammonia and soap
never hurts) and brush it to remove as much of the rouge as possible
Also, if you don't want to use light oil, use lighter fluid as a
diluent for the rouge. Works beautifully and doesn't create the
"scene" you might think, because it evaporates quickly. You can use
a little lighter fluid OR some ammonia and soap after soldering and
before pickling to clean up the rouge.
It works beautifully and seems more tolerant of higher temps than
whiteout or yellow ochre.