I am in need of a pen that I can use to label my logs and blanks, one that will write on almost anything including wood sealer (wax). I'll use a sharpie before I wax but I can't always do that so I need something that will write on that, even on bark if possible. I saw a post a while back that had a suggestion for a pen that wrote in silver colored ink that would write on anything that was used for writing on wood and even for marking lines on dark wood (it wasn't a silver ink sharpie). I just can't remember what pen it was or where I read it. Any suggestions would be appreciated.