I am sure the Aero Kroil helped, but in the end, it was the press that prevailed.
We chucked it up in the press with a 19mm socket to keep the fairlead end plate from deforming. It squeaked and then immediately gave way with very little pressure. But once the bolt pressed flush with the roller, it was stuck again. So out came the punch again. That was fine until the punch slipped and boogered the top two threads... :sigh:
Fix one thing, break another. Seems to be how I am rolling these days...