[Christ]

Know how to polish glass? That's how you remove it.

It's a silk-screen application to the glass, so you can remove it with a razor scraper for the most part, but you'll have to lightly sand/polish the glass to completely remove them.

You may be better off getting a sheet of lexan, and cutting it to fit in the same space as your sunroof, or removing the sunroof altogether and making a pan that fits in the hole, putting the panels in the pan, and covering it with lexan.