I found that Tarka seems to have collected a rash of tar spots on the side of the wings.
So, how best to remove them?
There are a range of expensive products that claim to do it, but I've also been told that good old WD40 will do the job.

Does anyone have any experience with this problem and what is the collective thought on the best solution?

Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...