Hi everyone: I recently bought a Trapeze which I LOVE but unfortunately, I got scratches on the back of the bag. I bought the Saphir Nappa leather balm (http://www.hangerproject.com/saphir-nappa-leather-balm.html) which has been highly recommended by tPFers in both Celine and Hermes forums. I don't know how much to apply and how many times to treat my bag to buff out the scratches though. Any thoughts would be greatly appreciated. Thank you!!