it does make me cringe when I see group stand flags/banner/gazebos at shows not fastened / fixed down correctly or someones 'bodged it' together with a cable tie or gazebos ties to flimsy bins etc etc, not saying this is whats happened in this instance but id be right pissed if one hit my car at a show due to this

I feel your pain mate its a bit shit that someone knows what happened as they would have had to pick what ever it was the hit your car up and knew it made the damage

hope you get it sorted mate