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I should add that I lather IN the scuttle, and not anywhere else. I load up the brush by drying it nearly all the way and then loading it with soap.

I then gradually add water to the scuttle as I...

http://straightrazorpalace.com/brushes-mugs-stuff/15926-redneck-scuttle.html

scuttle is the answer, but you don't have to spend a lot of money unless you just want to.