/diy/ - Do It Yourself

>>2775174
>how do I know what is going to work right for this?
Ironically, black is difficult to color match. Anything you buy is unlikely to be a perfect match.
Just go to any local store that sells Sharpie markers and buy one of those in black color.
If it's pinpoint splatters as you suggested, get the fine point version and test on a couple of spots.
You can quickly decide whether it works to your taste.
"Dye Pens" are just re-branded, more expensive, Sharpie-style markers.