Those stains would be a piece of cake for LS, but if that's the bag's only issue you might be able to take care of it yourself (if you're brave enough to try, lol). There's a thread somewhere on how to take care of and clean lambskin bags, but I can't recall the title.
Hi ironic568! LS mixed up my email enquiry with their another customer and they told me it would not worth the investment to send the bag to them from oversea for the spa service. So I was trying to clean it by myself. Although they later on came back to me and said that it was an misunderstanding and my bag could be cleaned with good result, now I wonder if I really need to send it to them. Please take a look: