Did you try it yourself
I got a lad out to do it took 3 hours to do 2 windows he used a machine like an orbital sander with different types of grit paper and sprays did a savage job
Im sure this is the same lad
Cant find his number think it was on my old phone
Watch "How to remove scratches from car side windows by using DIY GP-WIZ Windscreen Scratch Repair Kit" on YouTube https://youtu.be/doYlaQlCloQ
That's interesting these guides leave marks on the glass. No damaging marks but when roll the window down you can see the 2 lines they leave. Never thought of cleaning them however to fix it.