Same here, I use Markal Laquer Stiks for filling/restoring stamped/engraved lettering. As mentioned needs some depth for these paint sticks to work, like filling in with a Crayon.
I've also got a couple of hard handle Snap-ons with worn lettering. I haven't tried but I don't think these Laquer Stiks will work, not on mine anyway, way too shallow.
(They don't come in these tubes when you buy them)
