Does your insurance cover windscreen replacement?
Yep but you have to pay about £50 one time fee as well as getting a brand new one over a second hand good condition one. Annoying!
I tried the vinegar and apart from getting the bugs off which a normal wash would have done and some mud it made no effect.
So i found the smoothest finger on my hand (not many since all the sanding etc i have been doing) and ran it across the screen... seems like they are in fact tiny tiny tiny chips in the glass!
Very weird as there are thousands and thousands of them all over but i am guessing no sealant or buffing etc will cure it for the moment right?
Lewi