Motion Pictures Cleaning Moon Discs

Sorry about the "Motion Pictures" prefix.
I got some wheel bearing grease on one. What do you use to remove it? What do you use for general cleaning purposes?
Thanks!

 

WD40 on a soft cloth

 

If they get scratches, WD 40 on a 3 M green pad. In a swirlling motion to follow the lines, fairly deep scratches will disapear with little effort. For heavy grease, a dab of carb cleaner on a rag.

 

I use a combination of brake cleaner and windex; brake cleaner to get it degreased, then windex to finish the job. Newsprint isn't bad for cleaning, either. Not too aggressive, but has just enough teeth to help clean the aluminum.

 

i used degreassing dish soap with a 100% cotton cloth and water. it worked good for my caps.

 

Thanks for all of your suggestions.