So I was cleaning my bags two nights ago...more specifically the Coussin GM because it has vachetta on the corners and they were getting rather dirty from me setting the bag down. I finally tried the magic eraser...and it worked quite well! I don't have pictures of the corners before/after cleaning because I didn't think there would be any noticeable results, but oh my the beautiful smooth patina'ed vachetta on my Coussin is now so gorgeous. I did do a before/after cleaning thing for a spot that was on the strap though. I'm not sure what it was from, because when I received the bag from an eBay seller last year, the spot was already there. It does look something like a smudged pencil mark, or maybe some smudged dirt, perhaps? Anyway, here are the results: BEFORE AFTER You can still kind of see where the spot was, but at least I had difficulties finding the spot IRL! So I've compiled a little guide for those who would like to try this out. I have to put a warning here though, as with any unofficial LV cleaning process/method, TRY AT YOUR OWN RISK. I am NOT responsible for ANY damage these procedures may cause to your precious bag!! I also do not recommend doing this on new/light patina vachetta. Here's what you'll need: - Mr. Clean Magic Eraser (the one with the white upper half and blue lower half...the regular ones are good enough) - Apple Leather Conditioner, or an equivalent leather conditioner - Clean cotton cloth - Something to block your nose (I'll explain later) Here's what to do: 1. Keep the magic eraser dry at all times. I found that it isn't more effective if it's wet. 2. Gently "stroke" the spot with a corner of the white part of the magic eraser. Try to stroke in one direction to prevent damaging/thinning the leather (if that's even possible) *At this point, you may start to notice that the vachetta where you're rubbing becomes lighter and drier. Do not panick! There may also be some flaking/dusting. I suspect this is from the magic eraser rather than the leather...because...well, leather doesn't just flake off like that. This is where the nose-blocking may come in handy. I did this without covering my nose and ended up sneezing all night* 3. You may notice that the white magic eraser has brown colour to it...for me it was definitely the dirt. At this point your vachetta may look brittle and dry. Blow off any dusties/flakies that may be on there. 4. Squeeze a couple drops of leather conditioner onto the vachetta. 5. Rub the conditioner lightly into the leather using the cotton cloth...then buff gently. You will notice that where the vachetta was lighter, it will be restored to its original colour. * When rubbing the spot with the magic eraser, DON'T RUB TOO HARD! If you do then you will actually begin sanding off the surface of the vachetta and even after conditioning the leather (it will be restored to its original texture) you will notice that the leather is lighter at those parts. Be very gentle!* Well, I hope this helps...the above procedure did remove that spot from the strap of my Coussin, and hopefully it'll help you in some way. Good luck!