This may have been addressed before, so apologies if I missed it. If anyone can point me to where that's great too:
I just purchased a petit NOE new. Very excited to have found this style. TERRIFIED of the bottom vachetta. I'm interested in the patina champ method but would love to hear if there's anything I can do immediately to protect the bottom but still allow it to patina. I always see vintage ones with huge liquid stains on the bottom and I want to avoid that as much as possible.
Hi,
I know exactly what you mean... I bought brandnew because there was no NOE in decent condition...
I protect my Vachetta with Collonil Nanopro Spray (something like apple garde)
And yes -even if a lot of people find that stupid or not necessary- I sprayed my brandnew Noe ...

just because I would totally freak out about the light vachetta and eventually end up NOT using it at all.
I‘ve been there with other Vachetta bags which I then sold

Still in love with Azur/Monogram I bought a new azur bag and just sprayed it as an experiment... well aware that this also might have gone wrong...

I now own only two bags with Vachetta (Speedy Azur and Noe Monogram) and I have treated both. I dont regret it, I use them constantly and they do patina.
I grab them with slightly wet hands ( for example from holding a cold drink)- I‘ve carried them through light rain showers without running to my car or wrapping them in a plastic bag and I set down my Noe when I need to (not on the floor!!!) .....I can just enjoy them now.

But that is just me ... Other people swear on baby wipes ...
you just have to try for yourself!
Let us know how you decide!