I don't do anything differnt with thee PPF but nothing really sticks to it so I park it in the sun on a good hot day to let it self heal a little, I hit it with bead maker post wash as a drying agent and that's about it. It covers the entire car in my case so I let it do its job. It's coming up on 5 years on the car and has a couple places where it has done its job and I am about to pull it all off and replace it.
They do sell a ceramic coat for PPF. I would just use a hydrophobic product, like Hydro2, and call it a day.
How is the leather conditioner? Does it leave anything behind? I can’t stand greasy and shiny in my interior. I learned from my detailer to use a magic eraser to clean my leather, but I worry about stripping the leather. I may actually keep my current truck for a while and I'll lose my shit if my leather starts looking all clapped out. I hate that as much as I hate shiny.
I wouldn't use a magic eraser on anything that isn't already patirally destroyed. That quite abrasive for modern leather.