Yes there are some 'miraculous product' s - but not magic products
you need to find out why it's rusting...
to get rust you need water and exposed steel - you shouldn't have either at that window curve - the water should be running off and the metal should be coated.
however - best 'miraculous product's - tend to be Eastwood
http://www.eastwood.com/eastwood-rust-converter.htmlbut you'll need to be able to paint over it once it's sealed.
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2005 CRD
stuffSkeptic quod gratis asseritur, gratis negatur