Re the early registration - was it registered early in your name or are you the second owner on the V5 (registered in the garage's name first)?
It was registered early (21st Feb) by 'mistake', I'm the first owner on the doc and picked it up on around the 14th March... It was a brand new unregistered car, but it was ordered by the garage, not me, so I didn't have the wait.
I did take the £500 off and tried my luck with the DVLA (lots of photos of it in it's covers with a paper showing it was after 01 March..) DVLA wrote back saying there was nothing they could do, so I've just dropped it since I was loving the car so much and it doesn't show anyway... I think this one needs to be put to bed as I accepted the car at the time.
@Schuey - I think you are right, sale of goods act would protect me within 3 weeks, after that it's warranty work and they have the right to fix it.
We don't have lemon laws in this country like they do in the states unfortunately, so it needs to be a quarrel over whether the car is 'fit for purpose'... Now currently it is (apparently) as it has been fixed, if it continues to break down then I think I would have more of a case.
Re the paintwork, they need to get it back to the standard that I gave it to them in, and I will need to scrutinise it very carefully before accepting it back.
Alternatively, they could swap it for the 14 plate demonstrator 'R' they have out front and I would shut up...