Hi, I've managed to get a lot of my Willowcrest main wall/ floors together, but am now a bit stuck. I want to add lights so I think I need to add wallpaper first. I want most walls a plain colour but feel it will have a better finish if i use paper. Do you recommend buying plain coloured paper or just using white then painting afterwards? Also what do I use to seal the wood and some seem to seal the wallpaper too? I would really like your advice.