hi all, my mulberry bag is coming soon. some ppl in here suggest to spray it with collonil waterstop spray. can anybody tell me how you do it. like how many spray, how far from the bag you are supposed to spray it. etc.... also, i got a black bag. should i get neutral collonil or black collonil. lastly, is this the product? http://www.footwearetc.com/static_links/026-waterstop.html your help is much appreciated.