Hey!
Speed Glaze is a very unique product. It does contain a paintable polymer which makes it safe for new paint while providing enough protection until the paint can cure.
It also has a high content of Meguiar's Polishing oils so that it gives a deep dark shine like other Meguiar's products such as #3, #7, or #81.
Finally, it also a cleaner, with Diminishing Abrasives. So as the cleaner breaks down, it polishes the surface. This is a huge advantage.
These characteristics make it unique in the Meguiar's line up.
Compared to #66, a one step cleaner/wax "specially formulated for high-production reconditioning", I find Speed Glaze quite superior in terms of shine and gloss. Moreover, the Speed Glaze can be used on uncured paint whereas #66 can not.
As it is a polymer product, you must let it dry on the surface before removal in order to allow the polymer to bond properly. You should allow at least 15-20 minutes before removing.
Cheers!
Tim