some people say sand or scrape and some say scrub it off with the alcohol .
You need to do some test pieces to learn different ways to do it.
This was my 1st one.
Mix is 1oz. powder to 1 Quart Alcohol
I use 1/4 cup Alcohol to 27 grains dye powder, that's more than enough
So 1oz. of several colors is all you need.
J.E.Moser's Dye's