I've been down that same road. Buy new cylinders. They are not that expensive. Your time has to worth something. New ones will save you time.
It's good to be able to go, but it's better to be able to stop. If well working brakes aren't #1, they are darn sure #2.

"Truckin' Around .......... Since 1937!"
My name is Joe and I am addicted to Classic Country Music. I just can't hep myself.
Operators are standing by to take your calls!
Now cruising in the Passing Lane