I'm one who has been remiss in posting review in that useful forum.
If you've seen many of my posts, you may know I'm a die-hard Zaino fan. I'm sure it's the reason my white '75 Jag has won its national awards, and I love the durability it gives me. I love Zaino's car wash, sealant, & and QD, Z16 for tires, Zaino leather cleaner and conditioner. But -- bigoted as I am in favor of Z products -- the Zaino glass polish and plastic polish have been big disappointments to me. At this point, I use them on my less-loved cars, or when I merely need "maintenance" instead of "renovation." I know this is not very evaluative; it's just my off-the-top-of-my-head appraisal. If you're interested, I'll try to think back to some more specific instances I can describe. But last year, when I received them before the 2003 Concours season and used them with great expectations, I was profoundly disappointed and pretty soon consigned them to the product-lines I keep for my "beaters." :down