This post first appeared as What's the Difference in Our 3 Wood Frame Types? (Natural Wood vs. Finger-Jointed Poplar vs. MDF) on Frame It Easy - Learning Center for Custom Picture Framing.With a few different wood frame types -natural wood, finger-jointed poplar, or MDF - which choice is the best for your picture framing project?This post first appeared as What's the Difference in Our 3 Wood Frame Types? (Natural Wood vs. Finger-Jointed Poplar vs. MDF) on Frame It Easy - Learning Center for Custom Picture Framing.