Anything made of wood can be fractal-burned, hand wood-burned, or etched...

as long as the owner is comfortable with the requirement to sand down to the raw wood finish to allow for these design techniques to take place.

This page represents an array of pieces (both finished and in-work) where sanding the original wood piece was required to achieve the design outcome... which ultimately gets completed with a clear coat or wood-preserving finish (via epoxy resin or wood oil).