Hi All - These appear like footmarks / dirty marks. Have been through 2 Bunnings staff inspired options to clean the marks off (Bona Wood Floor Cleaner and O'Cedar Clean & Shine). Neither worked. Also another piece of advice (white rubber / eraser) - also no go. The marks are all over the house - any ideas what might shift them (presume they are off soles of shoes ?) - but guessing as only just bought the house and they were there already.