I have those stupid dots on the inside of my windshield above the RVM, below a solid black band.
This stuff is like paint on the glass. In the solid black region, the suction cups won't stick. And even if they did, the dots would interfere with laser reception if nothing else.
Honestly, I'd really like to mount my RD so that it's "line of sight" is through those dots (that's right above the RVM), but I'd lke to get rid of the dots.
I have tried a razor scraper. It didn't work. I don't know of any mechanical (tool) means to remove them...
I would think paint stripper, judiciously applied, might do the trick but... A little concerned that it would etch the glass, causing the same problem (laser reception).
Any other ideas out there?