I worked over some of the sloppier areas with the Smudge and Clone Stamp tools first. The shell pink hue on the brush bristles in the original collage was sucked out with the Sponge tool, set on "Desaturate." That particular pink is apparently the result of the acids in old papers interacting with the gesso or polymer I use to put these things together. Sometimes it looks appropriate. Sometimes not. The truly odd thing is that usually after a year or so, it disappears from the composition and leaves the original white as it was before.