I'm so sorry no one has answered this question by now. I just joined less than an hour ago or I would have answered before. I did our sunroom in a paint treatment using a double wooly roller I bought at Home Depot. I used Wal Mart paint in February Gold and an off white color I don't remember the name of. A double roller pan comes with the roller. You add a bit of paint to each side. If a bit gets mixed in the wrong side, don't worry, but you don't want too much mixture until you get to the wall. Get your wooly roller wet with paint just like any other roller and roll in the same pattern as you would a plain roller. A couple tips for the corners and ceiling. A small wooly tool come with the kit for doing corners and at the ceiling and base of the walls. It's worthless in my opinion. I found ramming the roller into the corners and ceiling worked best and looked oh so much better than where I used the wooly tool. If you already have baseboards on then you'll have to cover them well with tape. I use the widest brown paper tape I can get for base and other trim. If you do get paint on trim just make sure you have a damp and a dry rag handy for clean up right away. You'll love it. I added a picture of our half bath that is off the sunroom so you can see how a dark gold color with off white can make a very happy yellow double roller paint treatment.