BSD beads way better than 3in1. I haven't used either on paint but mainly PPF. Sure, this stuff only takes like 20 minutes to top off. Prior to full wrap PPF, cars were coated so maintenance was fairly minimal aside from a wash. IME, with PPF, once I notice a drop off on water as I rinse the car, I know it's just time to top it off again. But for me, any LSP just doesn't last like it does on paint so I top often.
I think I posted my thoughts, but yes, there are PPF/wrap -branded- coatings out there.
Haven't tried it . Probably won't. Nothing just sticks and sticks well on PPF, so the wear-off is fast...
I can't recall if I posted this, but PPF is also very -absorbent-. So it is important to keep some sort of LSP/topcoat on it, to minimize how much it absorbs. Especially if it's a daily driver and you drive it through rain, where all sorts of oil water, etc *muck* gets thrown at it. It's a huge upsell and lots of pro detailing shops do PPF versus -paint correction- but ya gotta understand the pros/cons of PPF. Yeah, I know the irony. PPF does minimize maintenance. However, ones does need to keep on the upkeep on keeping PPF sealed imo. However, I can now wash, dry , etc and not even worry about micro marring. Or todays paint, which is just crap, and not worry about rock chips, etc.