So when I bought my truck, I noticed that you could still see some "writing" in the window. I am assuming they used a grease pen at the dealership. They scraped it off when it was detailed but in the right light, at the right angle, you can still read it. Looks like it was baked into the glass by the sun. What is the best way to remove that? Any ideas?

Thanks!

 

Try some Barkeeper's Friend or a clay bar.

 

Might try rubbing alcohol or a little vinegar and water mix. I'm betting 409 or some dish detergent would probably remove it.