More power to ‘em.
(Now I’m dying to know what and how)...
Sorry. I know I am following my own strong feelings of respect about their efforts and not anything they demanded from me - because in all we discussed they revealed nothing about how they do it.
I will only say that if you are ever visiting the shops and galleries in New Hope, Pennsylvania, you might run across their studio-shop.
If you do, run across their place that is, I am sure you will recognize the unique process and you’ll tell me then that you found it.