SL Mirror black spots?

[DSB SL AMG]

Hi all,

Cleaned the SL R129 today, decided to put a bit of showroomshine on my side mirror (as done many times before), however its now left black dots on the mirror surface which will not come out...

Any ideas?

Cheers
DSB.

 

[DSB SL AMG]

Wrong room...have reposted in detailing forum.