Windscreen Chip & Windscreen Tint Standards
Don't get the wrong advice as this can often be very opinion based. RTA have standards in place, that's the law.
Don't be afraid to have a RWC mechanic refer to the standard if you feel you have had the wrong advice. Always deal direct with you local windscreen company for replacements, don't rely on the RWC mechanic to contract it out. It will cost you more and you will not obtain a direct warranty.