In Ignition, Clark describes an interesting approach to thermal control in rocket engines using oxygen as an oxidizer and hydrocarbon fuel: A small amount (few percent) of silicone oil or another silicon-bearing flammable chemical was mixed with the fuel, which would lay down a thermally-insulating layer of quartz on the inside of the engine. This was continuously ablated, but it also was continuously applied as the silicon carrier combusted.
Did anything happen to this idea? Did it ever get out of the laboratory, or become anything more than a curiosity? Is it pointless with modern developments in regenerative cooling?