Spring cleaning is here and so are the black streaks.Got on the internet and one person recommended Tuff Stuff Foam claims it will remove streak and not damage wax .I had some out in the garage so I figured its worth a try.Sure enough sprayed it on and the black streaks wiped right off.Now I know there are tons of products out there to do this Star Bright, West Marine and the list goes on and on and I have no doubt these products work just as good .But a 22 oz. can at any store cost around $3.50.