I'm currently in the process of printing from old negatives, some of which are 25 + years old and perhaps not surprisingly a fair proportion of these negatives are scratched or have spots in them. I'm currently using some SpotOne that I have and need to replace soon. But that got me thinking is there anything else in the market and what did I used to do. Originally I trained at Art College (Fine Art) a large proportion of what we did was printing and photography and then I worked as a printer for a number of 8 years or so predominantly in silkscreen and in both we used to use Zig Opaque pens to spot in and repair negatives (amongst a variety of older and more dubious methods). When in college we also used these pens for the same purposes in photography. I just found one of these old pens, and wondered whether anyone else had come across them or use them, and if not what do you use?