What are these for - '73 disc brake :

I'd like to second Duster Harrys opinion on the copper anti-sieze. I've been the auto parts business for over 27 years and recommend it highly. you can also put it on any where the caliper slides. Be aware that some brake pad manufacturers such as Wagner Thermoquiet do not require ANY compound and will VOID the warranty if you do! If you do need to return them be sure to clean the anti-sieze off with some brake cleaner. Speaking of brake cleaner, o not use brake cleaner to wash off brake rotors, only cold water with transparent dish washing soap like Dawn. Hope this helps.
I came here looking for an answer on "what the hell do I do with these rubber bands?" and got it. Gotta wonder how long they last though.
Regarding brake rotor cleaning, I have always used methyl hydrate (alcohol) to clean them. I know that Varsol, turpentine or mineral spirits will leave a film behind but figured that alcohol was perfect. Seems to work really well. Is this wrong?