Have a look through this mate.http://www.mk5golfgti.co.uk/forum/index.php/topic,48873.0.htmlWhere is your rust? If its wheel arches, sills or boot then they are common mark v problems. If so, you may be able to get it done free of charge but its a bit of a lottery. VW won't accept it as warranty because its not perforation but they call it a goodwill gesture.