Originally Posted by pc1
Rosewall writes in one of his books that the indoor court to his mind was wood when it is treated with paint to slow the ball a little was ideal. He later writes in the paragraph that the courts at Wembley when they were wood was an ideal pace. So the assumption would be that the courts at Wembley were painted.
Thanks, pc1, for explaining the matter. It's a shame I did not know it.