Sometimes for really diaphanous fluff instead of comb or brush the nubby textured silicone glove works well, and my rabbits love the gentle massaging feel.  That said though, on my crew it's only useful after I've combed out the big stuff, then use the glove to swipe off the loosened light residue still floating on the surface.  Try a simple rubber glove to get the idea before investing in a specialized tool, see what you think.