I like using the "Seals-It" washers on rod ends. Then wipe the the ball & race with wheel bearing grease.
The only problem, the Seals-It washers are about .040 thick each so installing them requires .080" or so extra clearance. Easily accommodated with a new build up but can not always be fitted in existing brackets. [depends on the bracket and application]
They do a good job of keeping dirt out of the rod ends. [and grease in!] Really extends the rod end life.