I recall reading earlier this year that some people, especially in the UK, could not find rub-n-buff and were seeking a source. I couldn't find those threads, but in case those people or anyone else are still searching for it, The Compleat Sculptor [sic] has it in their online catalog.

http://www.sculpt.com/catalog_98/patina/rubnbuff.htm

I hope that's useful for someone. I had to open the frame with that page separately so you can restore the frames version with the link on the bottom of the page.

-x