This lesson i was finishing off sanding, filing and smoothing down any bits of wood i hadn't yet finished. i started by filing down all my rough edges so that the chair could fit into each other with a bit of room for the finish to be applied, once they were sanded and i was confident that my chair fit together well i went onto sanding down the edges so that it was more erganomically pleasinG. i smoothed down the seat so it curved round and curved off the arm rest so all the edges were smooth and no harm could be done on them.