It's not spring yet is it, so I'd hang fire. However (& I realise you know this) there are some points there, just waiting ....
was a time when my STR was even worse than that, the whole plate was black. had a bike copper pull up next to me to advise me to clean it at the earliest opportunity, as a car officer would not give me the same opportunity to resolve it... unfortunately, he had pulled up so close next to me, I stood on his foot for a while.. lol I was in gear, clutch in, with radio on, and left foot down, so had to swap feet over so I could release my hand to turn my radio off (left hand)
Hope you covered it in acf50 before winter??? I would cry if my bike looked like that but fair play if you commute on it.