It is ok from what I've read. I think it's suppose to stretch out the amount of time you can leave ZFX and Z whatever mixed together. I let Z2/ZFX sit in my garage overnight (about 40degrees) back in March and it was fine the next day. Why would you leave Z6 or Z16 in the fridge ?
Well my garage gets really hot throughout the day, and I figured I'd put my polishes in the fridge, so I might as well put the rest of my Zaino line in it. It's empty so I figured it's putting the fridge to some good use lol. I just didn't know if it would be bad for the stuff or good.
Lol, funny you two mention that. A week ago I picked out a bottle of water from the fridge with one hand and the bottle of Z-2 with the other and I almost drank the Z-2.