QUOTE(KrisMas @ Oct 17 2014, 09:55 PM)
I'll just do some guesswork here until you have a good look at it again. But, my best guess is, those are pin holes size pitting caused by small grits, most probably sand particles, frm frequent high speed driving (highway, etc). I'm also guessing that the Glaco u're using is either acidic (which in actual fact not a bad thing and normal for a windscreen cleaner/protectant) and reacted with the laminated glass or some sort of polish that left some residue inside those 'pin holes'. You might not have noticed it before this because those pittings are 'empty' but now, since it's 'filled' with something they became more obvious. Check frm inside, up close, it would look something like minute stone chip, darker since the whitish stain are only on the outer top surface. 'Speed Hunters' should be quite familiar with this....what say you
Quazacolt?
LCTho85fully agree.
although on my opinion, instead of sand particles, considering the car is second hand, it could be small craters developed from frequent highway and/or speeding.
if the windscreen is maintain clean at all times, you will be seeing it a LOT.
chances are it was previously caked in dirt/grime etc so it wasn't obvious until you clean/wash it all off, exposing the "craters" which you most likely can feel from fingers/nail. (as you also mentioned scraping them with nails)
other than that, pretty much agree on the rest with you as well

and yes my car started having it's first few craters within the first month.
moving forward today as it's around 10-11 month ownership, the entire windscreen is filled with it and i stop giving a f***

i'm grateful enough that there's no crack lines that require actual repair work/filling or worse, entire replacement