I keep the Van Dyke sensitizer in the refrigerator in a blackened
bottle.  When ready to coat, I shake it up and pour an inch or so into a
glass container.  I normally wait for the sensitizer to come to room
temperature.  I dip a four-inch foam brush into the container and allow
it to become saturated with the solution.  I then push the brush against
the side of the container until I've squeezed as much as possible from
the brush.  I then lay even strokes across the paper, slightly
overlapping.  I turn the paper 180 degrees, and go through the same
procedure.  I then turn the paper 90 degrees and repeat.  I finally turn
the paper 180 degrees and repeat, trying to ensure that there are no
"puddles."  I allow the paper to dry in the dark.
george
-- Handmade Photographic Images http://www2.ari.net/glsmyth