Hi Hank,

I would not give up on those dies. Soak them overnight in KROIL. See what that does. Stay away from WD-40.
Salts from one's hands will cause surface rust. I always wipe my dies down with a light coat of oil after each reloading session.

Not only will Kroil remove surface rust, it will also remove carbon from your sizing die, and lift lead deposits from your seater and crimp die (if you reload lead).

Let us know how you fair. I like the Hornady Bullet Seating die. I might want to give it a try.

GB