Perhaps the biggest challenge you face is working with finished materials. It sounds to me as if you are trying to install prefinished trim on top of walls that have been finish-painted.

Interior walls have different finishes and textures, and are made of various materials, which requires matching painting tools and techniques to each specific type of wall for a professional end look.

Accent walls are one of the easiest ways to create visual interest in any room, but you have a lot more options than just a fresh coat of paint.

In this kitchen, by Excel Interior Concepts ... When looking at all the finish materials together, “find the neutral that stands out, and paint the walls that color,” Miller says.

That’s why I asked 6 interior designers and stylists - in other words, the pros that have to pick out paint day in and day out - what paint finish is best for walls and ceilings in their opinion ...