seems easy to do in concept. It would just be a really really thin/long capacitor. I'm guessing the 5 layers would be go like
primer layer
capacitor plate paint
insulator paint
capacitor plate paint
cover paint
The problem would be if the paints weren't the same thickness across the whole way and some sections of it started looking like uneven plates of the earth's crust. You also run into the problem of the insulator being so thin that the amount of charge being stored would be really small, but I guess if you're painting an entire room, then the huge area could make up for it.
Edit - read a little deeper, the primer and cover paint aren't there in what they're saying and it's the "positive and negative current collector".
primer layer
capacitor plate paint
insulator paint
capacitor plate paint
cover paint
The problem would be if the paints weren't the same thickness across the whole way and some sections of it started looking like uneven plates of the earth's crust. You also run into the problem of the insulator being so thin that the amount of charge being stored would be really small, but I guess if you're painting an entire room, then the huge area could make up for it.
Edit - read a little deeper, the primer and cover paint aren't there in what they're saying and it's the "positive and negative current collector".