Not sure what they are called but I use those little foam wedge looking brushes you get at lowes/homedepot. I get the small ones that are 1" across and I trim the very sharp end off about a 1/8" back. These work pretty darn good for me but as stated you just gotta be careful when doing it.
So far I usually do all my carving and what not, dye the project, dye the edges, burnish, seal.