This accent ink is thick and has a neat applicator similar to a nail brush but the brush is stiff foam. This ink is acid free, archival and fast drying. It is great for paper, glass, metal, clay and more. Perfect for highlighting in grooves and recesses to add a bit of spark to a piece.
If you are using this product on metal, it may take several days to dry. To speed up the drying process use a heat tool. I would first try a toaster, dryer, or dehydrator. A heat gun may bubble the ink.