I would appreciate carpenters' advice. I recently had my skirting boards replaced, one of which needed to bend around a curved wall in my hallway. The joiner has applied the kerf cuts to the outer-moulded side of the skirting board and then once glued in place has filled in the kerfs with poly filler. It looks awful. The beautiful curve of the moulding is gone, they've attempted to sand it down and it's misshapen. Am I right in saying that the kerf cuts need to be on the inside of the skirting to allow for natural movement together when the skirting is placed around the curved area of the wall? As it is one of the focal points of my hallway and very noticeable, am I justified in insisting it is removed and replaced?