You have the most beautifully patina on your bags. Maybe I will try the black rock. I'm not sure if I can post links to eBay but I found a few auctions for about $6. Is that what you bought? It did say not to use it on untreated leather tough. So confused!
No - I don't ever use it on vachetta - just on my leather ricky bag. I'm a VERY firm believer after buying LV for almost 30 years - I never treat my bags.
Don't use it on vachetta! Sorry if that was confusing!