Definitely goes both ways. He'd be unstoppable because he'd be moving his defender because of his size, which is illegal. The only defense against that for the defender is to try to root out with their leg, and/or to double hand and arm bar...just to hold their position...also illegal. Painter and Purdue fans focus on the arm bars and pushes in the back...what they forget, I think, is Edey is initiating it all just by being him, and posting up. If it were ALL called by the letter of the law, it'd be rare to get to the arm bars and pushes in the back, because those are often reactive moves by the defenders who are are overwhelmed and pushed back by his size (from normal post up moves).
Its pretty rare that Edey walks in to post up position, first gets pushed by the defender, then starts his posting up movements (That's what IU's post players do, unfortunately). Painter runs too much stuff with movement and action for that to happen all that often. A large portion of Edey's post movements come immediately after he's set a screen for someone, who catch the ball and immediatlely look for Edey who's actively sealing his man after that screening action.
They'll run it a ton tonight, I'm sure. Smith or Loyer will kick to the wing and cut down under the basket...Edey will set a down screen for Loyer or Smith, usually Smith. They'll run tight off it, possibly even curl to the middle off it. Then if Edey's defender stays hugging Edey, he'll drop his leg in to them, and spin and seal, and Smith will bring the ball back and dump it down to Edey...OR, if Edey's man hedges at all, Smith will lob it up to Edey at the rim.
This is an example of a way they get Edey the ball in the post, and basically every time, Edey will have initiated the post contact, and fouled his defender...causing them to have to foul him back.