What is the best tye of filler to use to fill gaps between skirting? the skirting does not lie flat on the wall and so there is gap along top edges> would an all purpose be best? The walls have been replatered and old skirtin gtaken off and new mdf attached. However there is gaps along the top as the skirting will not stay flat on wall. we hav ebeen recommended terion? aalso what is bets to fill drill hole sin skirting? basically i got a job done on a fixed quote then the price of materials was added and then afterwards hhe said that the gaps needs to be filled along top as he couldnt fix the skirting flat. ...so I have to do it myself as I can't afford for an unforseen job that has been created....is there a process to this filling and do I need a filler gun os something similar?,......many thanks