Quick Aluminess install question

[ANZAC]

What size drill is used to drill out the expanded bottom edge of the hinge pin?

(not the through hole itself, just the mushroomed bit at the bottom)

I need to remove and de-rust a barn door hinge, trying to be as neat as possible.
Yes, spray lube and penetrating oil didn't work.

[Ford_6L_E350]

I don't remember the exact size, just start with 5/16" and go up slowly. It doesn't matter if you go too large, as long as you stop before you go more than 1/4" or so into the hinge.

Mike