My daughter had it put on her new Acura at dealership. I found it 2 oz bottle simoniz glasscoat for $24.94 including shipping. I been using Zaino for years just thought I'd try something different. I did a couple washing in dawn, then used clay bar lubricated with detail spray, got it slick. I put the entire 2 oz on the 2015 Prius, will report back next year and let you know how its doing. It took about 2 hours prep and an hour putting on. It looks nice and shinny.
unfortunately we will have to wait for a year for your comments.. Maybe, some body else with the same "seasoned" experience can provide their comments
Putting in the time, I'd have gone with Optimum Polymer Technologies Gloss Coat personally ( Optimum Gloss-Coat Paint Coating ) but it is better having that Simoniz stuff then nothing.
I'm totally un-enamoured of anything that implies it's almost an extra clearcoat, and will last coon's age. I use a quality liquid wax (well it must be, it's close to $30 a bottle up here ), apply it fall and spring.
You can do/beleive as you please of course, but I tell you that detailer applied Optimum Opti-Coat Pro (it is only sold to authorized detailers and must be applied by the,) will last a minimum 5 years on the paint/clearcoat. I have this applied on my current 2016 XC90 AWD First Edition. It's only been 6 1/2 months but it beads like the day it was applied and this is on black parked daily in the sun. I have also used their consumer version, which has changed names now, but then it was called Opti-Coat 2.0 It is now called Optimum Gloss-Coat. It was applied by me to my previous vehicle that my dad now owns and is still going strong and beading water after 1 year 10 months and that's with him going to automatic car washes once every 2 weeks. The BIGGEST things with these sealants is proper application techniques for proper adhesion, especially a properly prepped surface void of any old waxes, silicons or oils. Now, applied to glass and not paint, I agree that nothing is forever. Even Optimum's own glass specific product lasts up to 1 year. Rain-x much shorter and Aquapel more than Rain-X but still not over a year with that 'just applied' result.