Just an update to this - I just washed the car this morning and its 'marr central'!
The whole thing covered in the finest of marks, real hard to see in some light but when the sun hits its right....
.....terrible
Well I tried a few things in my arsenal and found I had a tube of Megs Scratch X - and it seems to be removing them nicely - by hand so a steady job mind you.
What product would be an equivalent to Scrath X that can be done my machine to speed up the process? Any of the finer correction compounds?
You cant really tell the Scratch X is an abrasive to the touch - whereas I also have some AG Paint Renovator and its like liquid sandpaper!
Just need to find the source of the marring now - think I will bin all my (new!!) cloths and things.!