Greg, I use lamp black (from lmii.com) mixed into Renaissance wax. It only takes a very small amount of lamp black and very little wax for that matter. I haven't removed any but would think denatured alcohol or some other mild solvent would remove it if needed. I just smear on the wax/lamp black and wipe the surface with a paper towel. Additional coats can be applied if you need a bit more blackening. I haven't notice any color tint other than good flat black. You might look at the lmii.com site (Luthiers Mercantile International, Inc.) and compare. About the same size and price.
