Iceman I salute you!
Just cleaned my filthy dirty primary mirror, I bought a 12" Dob through the classifieds and the mirror was thick with dust and "stuff"!! Must have been in the garage for yonks!
Mike, I followed your awesomely easy step by step instructions from way back and it was a breeze:

Had a bit of issue aligning the holes when putting the primary back into the OTA but taking out the mirror and cleaning was as easy as pie

Man the mirror looks brand new, just need to coliminate and I'm on my way.
Oh, and some clear sky's would be nice

This is the beauty of this site, the amount of good advice and information is never ending!
Thanks again Mike