Sorry to hijack again, but I have an update on my roof blemish.
The selling dealer said it was probably bird lime from its time sitting at the docks, they have come across this before apparently.
They arranged for a dealer more local to me to try & polish it out, long story short they went too far through the clear coat & had to respray the whole roof.
The finish was not particularly good & I sent pics to selling dealer.
They were disgusted with the finish that was left on the car & have arranged to take it back to where I bought it from & spray the roof properly back to original spec & finish, which in all fairness is good of them.
They have said they will give me a car while it is being done & send me a detailed video when it is complete.
Fingers crossed it will come back like new.