RWE... I have some old pine.  Don't get much Ash around here.  Would 40-50 year old pine work?  Any wood species that are better for this technique?

Thanks for sharing.  Nice work.

RWE ..... Old Pine is best! Wish I had 40 - 50 year old Pine. Grain direction is important. Quarter sawn would be best but any will do. Look for dramatic grain... it will be great. Spruce, Cypress, Fir, Cedar are all good. Softwoods are much better to use.  Experiment. Some hardwoods are good. I've had luck with White Oak and Spalted Maple.  Sample and experiment first though.