Quote Originally Posted by ianking View Post
G101, agitate with horehare brush then jet wash off always works well on cabrio roofs for me, even when moss'd right up.

I then protect after its dry with the meguiars protectant.

Done a V12 Vantage convertible at the weekend as per above as it hadnt had the roof cleaned in 2 years.
Ours should be alright, it's only 2.5months old. I panic when I see birdcrap on it mind you!