I found an old Certifyd strop on the big auction site earlier in the week. It arrived today. Other than being dirty, it was in great shape. The canvas strop had been chalked or pasted a long time ago. The leather and canvas came apart with the removal of a screw, so I took it apart for cleaning. I soaked the hardware in a rust remover that turns it green (can't remember what it's called), then scrubbed it with a toothbrush and rinsed it well. I soaked the canvas in hot water with a little dish soap and oxy-clean. I brushed lather onto the leather, worked it with my fingers, rinsed, and repeated. I then scubbed the canvas with a toothbrush and put it back in the soak. I rinsed everything well with clean water and walked on the strops between a layer of towels to dry them. I left them under a ceiling fan for a few hours to dry and then put them back together. Once completely dry, I rubbed Dr. Martens Wonder Balm into the front of the leather and worked it in with a glass bottle. I'm letting it all dry a little more until tomorrow, then I'll try it out. I'm very happy to have a nice vintage strop reconditioned for all of $18 with shipping.