so you use the chisel method? Im still not certain I understand your need for flame protection.
There is a way that you can make your work more flame retardent, make molds of your work and use a Rock flour/polymer casting process (marbleite etc).
I do not need flame protection. We have just been tossing around possible reasons as to why wood might not burn.
The process you mentioned above, can that be used for woodcut carvings? Won't that clog the lines, and interfere with the printing of the image? I don't think we are talking about the same kind of carving. But, I like the information you gave me Farmerman.