color code for silver plus2 roof ?

[lomh 13]

My car had never been resprayed.



The clear coat on the roof as been burnt by the sun on some places.
I have tryed dry sanding to remove it. It can be done, not easely, even where it is not burnt.
The metal flakes are still there after sanding, they in the gelcoat.
So, after sandig the whole roof, I hope that 4 layer of clear coat might be correct.