Pate de luxe I just used on an exotic bag that needed some more intense shine. I was more mentioning it as an example of a Saphir product I've used, I don't know if I'd use it on a regular balenciaga bag.
And yeah that's basically buffing! You can also use a brush if you want, but I find I have more control with a cloth. I also apply creams with a cloth. Buffing is 100% essential for polishes like meltonian etc. I'll look for a before [during] & after pic to show you what I mean.
I wouldn't say the top coat "removes" the cream per se, but you basically have one finish interacting with another wet finish and things happen, some of it is pulled up. Just something to be aware of!
Don't have a Zeli comparison offhand but can try to drum one up. Currently spending quarantine with family so don't have all my supplies at hand!
When I'm back I'll also snap pics of that dyed black bag. I actually ended up taking off the original handles to switch them out with ones from another beat up bag I cannibalized, but stalled on getting hardware to finish! Good reminder to finish that to bring it back to the world of the carried