06 staircase, Lili Giacobino

Carefully cut some 18mm engineered walnut flooring to fit each tread, add some matching nosing and glue in position. Once the whole staircase is done, lightly sand the wood and give it 2 coats of clear oil. Then stick some tape onto wood to protect it, caulk every edge and give a last coat of wood paint around each tread (also to cover any glue or stain that might have end up there by accident).