Don't accept any shoddy workmanship - I understand that builders have a contingency for repairs/replacements etc. on snag lists.
A lot of our windows were scratched in the cleaning process prior to us moving into our new home. I thought 'well, it's just a few scratches, so it doesn't really matter', but now, a few years down the line, it bugs the hell out of me every time I clean them!
My neighbour knew the system better than me and got any scratched windows, doors etc. replaced by the builder!