Well I finally got it off...I think I've had easier times trying to get seized caliper bolts of my car before
But the post is FUBAR. I don't know what happened to it...guy must've cross threaded it or something. Threads are absolutely destroyed on both the connection post and the post that threads onto (that's attached to the keg).
Any way to fix this for a reasonable amount of money, or is this keg officially a decoration?