Hi, Ive got a plastering moving around my house and he'll be doing the kitchen on Tuesday. I've been spending my time removing tiles and stripping other things off the wall etc. When removing the tiles around the window, its left a bit of a mess. How would you go about preparing this window area ready for plastering? There are strings of silicone and bits of tile lodged down the sides of the window... I imagine I'll need to get these out best I can and make the ledge as even as possible?? Am I missing anything else? Thanks in advance.