I have been ripping out the old basic sixties skirting in our spare bedroom. Of course it was fixed with an excess of those hefty great cut clasp nails. I have found the best way to remove it is to cut either side of them with my multitool saw and then remove the skirting then the nails. But it absolutely pulls out loads of the old plaster, leaving quite big holes in places. The new skirting is taller so will cover it but what is the best way to fill the damage sufficiently so that I can dab and dot the adhesive for the new MDF skirting?