I would love some advice if possible... I bought this Mulberry bag in 2010 and have used it a lot. The leather has become really worn and I'd really like to have it restored. I've been quoted £100 by Mulberry for their cleaning and polishing service. Is this the sort of thing I could do myself if I bought some leather cleaner/polish? I really don't want to mess it up so any advice is appreciated! Thank you!