I’d bought some Sharpies and highlighters a month ago, which did not meet my desires. Yesterday, i stopped at a supply store to get a giant clip board and i wandered down the pen isle.
One white Gelly Roll stick pen and one white Gel Excel (Marvy) provide 0.5 to 0.8 ish ballpoint application of an opaque white ink. A set of six “opaque stix” from Marvey – russet, green, blue, purple, silver, gold – have round marker tips and look great on black. I suspect the “chalk” style markers would do the same with a more matte effect.
…just getting the packaging off my desk, not actually doing any doodling….