my experiences have been with MX's but would still apply:
-keep hinge pins greased for each use
-small amount of grease on breach bites where locking bolt fastens
-small amount of grease on tip of cocking bar and forearm iron where they meet up with receiver.
-above needed for each reassembly when gun taken apart & cased after shooting.
-annually (if you shoot a lot)have receiver stripped of all parts and clean, ie: firing pins, firing pin springs, firing pin holes, ejector trip rods and holes, and underside of cocking bar and dove tail that it fits into, remove ejector & spring and clean all parts including interior of receiver.
-When reassembling the receiver parts lightly grease the locking bolt sliding surfaces and rotating portion and tip of the top lever and ejector.
-other than that the normal exterior wipe down of all external metal surfaces to keep metal finish bright and periodic inspection of the trigger group for possible debris / wear. Occasionally check trigger pull with scale to insure proper function-trigger pull weight.
-Note: some folks are comfortable doing all above themselves or have your gunsmith do the annual cleaning. As for what type of grease- a "high pressure/high temp type, several out there for sale, I use STOS- available from Ponsness Warren and they recommend it for some of the lube points on their reloaders.