Nick’s Tip #34Stop streaking
I have been telling people this for ages. To help keep your van free of the inevitable black streaks when it is laid up, keep the roof clean.
This is the where the black streaks cone from. The rain washes the dirt off the top, down the sides and hey presto! “Black streaks”.
Like most things they aren’t complicated to prevent, but a swine to deal with.
So get out the steps and the brush on a handle thingy and get to it.