I got a dilemma. I'm supposed to be taking the official photos for my mate's wedding in 2 hours. I've just went to clean the reflector plate above the mirror in my SLR camera and its all tarnished now.

It looks like splattered tarmac. This will undoubtedly affect any pics I take.
I've got other SLR cameras but they aint been used in years so the batteries will need replacing and I aint got time to go to shops as I've got to get showered etc and a 30 minute drive to the wedding.
Apart from that I'm more familiar with this camera.
WTF do I do?
I feel awful now and I don't want to spoil their day.
Sadly I aint even got time to read any replies to this so I guess I better move it & when the day is over I'll give you an update.
I wish I'd stayed in bed.