yup! top secret..... i got an old box of "Marshall's exclusive photo painting pencils". thats all the box says. they will not color on gloss RC prints...too bad cause i lots got more of them.
Thanks Eddie. I have some of those, along with some Marshall's oils. The pencils are easier, IMHO, to use but need a paper with some "tooth" and there aren't many of those left. They worked really well on Extalure G and X surface. The oils work on FB matte but even they are RC snobs!