http://www.ukessays.com/essays/law/consumer-protection-act.php
http://whatconsumer.co.uk/satisfactory-quality/
Sale of Goods Act 1979 (amended), Part II, Section 14:
(2B)For the purposes of this Act, the quality of goods includes their state and condition and the following (among others) are in appropriate cases aspects of the quality of goods—
(a)fitness for all the purposes for which goods of the kind in question are commonly supplied,
(b)appearance and finish,
(c)freedom from minor defects,
(d)safety, and
(e)durability.
How long have you had the car? I would assume that I'm not alone in thinking that you would reasonably expect a car's paint to be resistant to bird damage for at least 5 years if not longer? thus you would have recourse under the consumer protection act 1979. Ask your
dealer again nicely, quoting the act and if you still don't get anything then take it to Seat head office