The Razor Strop Paste from Thiers-Issard is formulated using both aluminum oxide and diamond particles as the cutting agents, which are suspended in a non-toxic paste bound together with tiny cloth fibers to prevent softening. The edge attained with routine use of this paste is comparable to that achieved with a 10,000 grit barber hone.
This half ounce of paste goes a very long way. Dab a bit on the rough leather side of your double sided paddle strop, or a secondary hanging strop that you have reserved for use with pastes, and and work it well into the leather. Strop your razor in the usual manner until the dulled edge is renewed.