If you attended Duane Mitch's Workshop tour in August, you mat be interested in some of the products that he uses.  One of the places that carries Dirtex, Hide Glue, and Ultra Fine Steel Wool is Amazon.  Be aware that the spray Dirtex that they carry cannot be used on varnished surfaces - it is so strong a cleaner that it removes the varnish.  The powdered Dirtex is safe for varnish.