Wow, blast from the past. It's similar to Mop n Glo, actually, minus the fragrance and I guess cleaning properties. I've never seen a gallon version of this product or one that's close to it.
I have some, when I do use it, it is a little involved. I have to use one of those long handled sponges and make sure it dries correctly before splotching. I use it strictly on the wheel wheels and undercarriage splash guards of my Audi because it creates the right shine for the particular plastic it uses. I don't use it on the others.