there is or was an inletting grease for marking the wood when inletting. i have a couple tubes but can't locate it. what is it called and who makes it. i know that i can make my own; but it is upsetting me as to what it is called and who made it. getting old is a bitch! NEVER MIND did a little more research and came up with "prussian blue". ordered some. now i will probably find what i already have.