My parents once had a go at fixing up some stone chips on their previous Bora. It wasn't great. You can get the appropriate paint code's touch-up stick and have a go at repairing the bonnet that way, or find someone to do it, like
Chipmaster, who I believe run a mobile service that'll come to you rather than you having to go to them. Nice. There should be a fair few companies that offer this kind of service but I've got no idea of prices I'm afraid
hth tho!