I was taking the skirting boards off in my hall and aside from a bit of filling here and there, I have pulled a chunk out that is quite deep and runs about a foot across the wall. My question is, would it be ok to fill with easifill as I have half a bag of it left.The new boards will be gripfilled to wall so now drilling into it. Only ask as will save be a trip to get some plaster and will save a few pennies. Any help appreciated.