I am really sad to see that you guys out there are still having these issues. ESPECIALLY THE OP WITH AN ICON RM. That is a REAL shame.
I browse still these forums from time to time (especially the RM one) because I miss the community when I owned my RM's, but seeing that people are STILL going through these same fender rust issues is NOT what i wanted to see. I was hoping that it was taken care of by now, since this was the main reason I traded in my RM towards my current GL1800.
I must've opened and cleaned/sealed 6 war bonnet lights during my ownership (whenever they changed the fender due to warranty), and even that task alone takes hours and made me question my motorcycle purchase. There's no reason that we should have to do any kind of preventative maintenance on a motorcycle that costs in excess of $28,000, that should be taken care of in the factory during manufacturing.
I hope you guys find a solution and enjoy your RM.