I have a simlar issue, i have seen a company on flea bay that produce touch up paint, i havn't tried it but i intend to later once winter arrives and the bike is off the road.
If anyones used it let me know.
Link
http://www.bike-paint.co.uk [Edited on 19-9-2005 by andyc]
[Edited on 19-9-2005 by andyc]