How to open up rocker arm oil passages.

When I built my /6, I took a piece of .049 stainless wire about three inches long and hit one end (about an 1/8") with a hammer on my little anvil. That made the wire flat. I chucked the wire up in my hand drill, clamped the rocker down and used the drill and wire like "rotor-rooter."
Norm
Now you're talking! What do people use .049 stainless wire for? Where would a rookie find some?