Funny... I saw you mention the side skirts in your grill block thread and was hoping you had some ideas...
I know the rear fenders of the Jetta really have no lip to attach anything to... a lot of great ideas on this site that can't be used on my car
Hadn't thought about using industrial grade velcro... might be an idea. Previously, my thoughts (after a bit of noodling) were to use the fender liner attach points to attach some brackets. Unfortunately, my bracket bending skills suck, and I haven't been able to get anything attached to the fender liner that was anywhere near aligned to where the skirt should go...
Hmmm... the industrial grade velcro is sounding better & better...