Hi Liz, You can absolutely use B-72 in a marking kit. Do you have the beads or the pre-mixed solution? Depending on the concentration, it also makes a really good adhesive, a component in gap filler, and can serve as a consolidant or varnish. Here’s one of the best resources I know of on uses of B-72, written by Amy Davidson (AMNH) and Greg Brown (U. Nebraska State Museum). This paper even covers some different mixing recipes (depending on usage) and great methods of dispensing your solutions. I attached the pdf as well. Hope this helps:
http://www.academia.edu/1237393/Paraloid_B-72_Practical_Tips_for_the_Vertebrate_Fossil_Preparator
