[esf]

They're probably etched in to the clear. That's why the SX removed some while the clay did nothing. They do make special products for removing water spots. I believe CG has one called Heavy Duty Water Spot Remover. I think this is one of the products that RR used. I don't remember the results but since he ended up wet sanding, I want to say it wasn't enough. Steve (Poorboy's World owner) I believe recommends his Professional Polish. This is something that could take trial and error before you find out just how bad they are and what is needed to fix them. I'm going to pretend like I didn't hear about your home made buffer. It kind of scares me. However, you might want to try using a terry cloth bonnet since it will provide more cut than microfiber. You may end up needing to compound them out which would also require a lighter polish to follow it up.