Those chips are quite deep. You can use a touch-up kit to fill the crater with paint and then flat it back with some 2400 WnD to level it off then machine or hand polish it, takes a bit of time but the results are good.
The bonnet is a nasty place to try and hide stuff like this.
I should have said earlier pay by debit card as correctly most garages won't take a suitcase of cash due to money laundering.
Sounds like standard dealer practise "let me talk to the manager blah, blah". For a bit more you can have this, why pay more for a certain colour? Bring the paperwork out and convince you of a good deal, sign today before its gone.
They don't sound very honest to me and are treating you like a mug.
They should rename their garage to Distrust!
Take your money elsewhere, plenty of Fiestas about.