Bookmark this page Share Email Facebook Twitter Linkedin Print Do I still need to trowel? 00 atome / icon / printCreated with Sketch.00 atome / icon / mailCreated with Sketch.00 atome / icon / fbCreated with Sketch.twitterCreated with Sketch.00 atome / icon / linkedinCreated with Sketch. Close Documents and more Spray Plaster Do I still need to trowel? Yes. Spraying helps get Thistle MultiFinish onto the wall and ceiling – the finish is still down to your trowel skills.