Been coaxed(by SWMBO) into plastering the house as she sez "it looks easy" been watchin to many DIY prog`s I think, anyway i`ve let the plaster go off and as i`m polishing it i`m getting lines on the plaster from either end of the trowel. Can anybody give us a clue how to avoid this (don`t need to hear get a proper plasterer in to do it ). Many thanks