I just trace the outline of a point on paper and add info like color, material, type, location of find and any other identifying marks like stacks and hinges. I plan on putting this info on individual cards and adding them to the back of each frame so the info stays with the piece.
I take digital photos of my finds and keep them in files on my computer. I file them by location and date. I can print a hard copy if I need to. I think there may be software available to document one's finds.
Good suggestions, thanks. Charl, did you mean clear nail polish?
that's what I do too, these days there is no need to mark them at all.
Good point! I'm still in the 20th century I guess. Might do "hard copy" labeling anyway, for the day the Chinese knock out our power grid nation wide.