I want to do this to our kitchen splashbacks which are much older than the units, and generally a blot on the landscape (they are grubby looking white, with dingy grouting, plus at some point in the seventies the previous owner 'cheered them up' with some stick on motifs). Although I've never tiled before I reckon that bit will be fine -- it's the smashing off of the old ones and amount of prep required to be ready to start again that I'm wondering about. Any encouraging experiences?