Well, that's good news!
The WD is good for unsticking and cleaning, but does not last long.
Grease would be better, or even motor oil would last longer.
The rear cable is generally a very cheap replacement part if you need to go there.
Slight shoe contact with rotor upon install is not really a problem, so long as it does not drag much. The shoes 'self-align' to some extent the first time you apply the brake. You may even find that the rotor rubs a bit going on, then the clearance is actually too great after brake is applied and released.
Shoes should get final adjustment after brake has been applied and released.
1986 300E 5-Speed 240k mi.