After the baling was done, we shaped the walls using a large weed whacker for rough shaping and the Lancelot for fine detail shaping. Having the bale walls fairly smooth and plumb will make the plastering much easier later on.
It’s possible to achieve beautiful finish plaster on top of undulating bale walls, but it is a lot more work and uses a lot more plaster, which involves extra labour and cost. No one wants that. It’s much better to take the time to even out rough spots on the wall at this stage.