Sharpie permanent markers are one of the ... markers from a hard plastic toy or container? Take a dry-erase marker and color over the permanent marker marks. Wipe the dry-erase marker off with ...

But wanting to add a little visual flair to his prints, [Devin Montes] came up with a simple 3D printed mount that holds the tip of up to three Sharpie permanent markers against the filament as it ...