On the outer surface / To outward appearances / (UK) Not in prison

at most

The state or condition of being an outsider.

Outside. / Aside from; besides.

With the outside surface turned to be on the inside

(idiomatic) The rest of the world outside of some closed, restricted, or remote environment. / (philosophy) The world external to the human mind.

(rugby) A player who is positioned between the inside centre and the right wing

(cricket) The edge of a bat farthest from the body of the batsman. / (cricket) A deflection of a ball off of the outside edge of a bat, often to the slips or wicket keeper for a catch.

(cricket) To hit the ball with the outside edge of the bat. / (skating) To place one's weight on the outside edge of the skate, thereby moving in a curve in that direction.

(idiomatic) Beyond the bounds of convention.