I usually hang out on an Alexander Wang thread. But I LOVE AMQ. I have been advised several times to use Collonil Waterstop. I ordered it on
Amazon. It's been said that it helps against transfers of color, for example, rubbing your handbag against your jeans, and also damage from water, etc... I've used it on 3 items and have had no problems, but don't carry my bags enough in those circumstances. I've read that the product you've mentioned is a good one too. Do searches on these threads and on
Amazon, which is the mother lode of sites. I've asked several people who are regulars on the A.Wang handbag sites about treatment of their handbags, and Collonil came up many times. However; I'm sure that the one you chose is just as substantial. Good luck!