Grog Full Metal Paint Refill 200ml - Burning Chrome Blue The flow of ink is

The flow of ink is controlled by pumping the tip against a piece of scrap paper or directly against your surface

which reacts only under UV lights until it turns into a deep dark brown satin finish

2 and 4 colors

which makes the colour output adjustable

an article appeared in The New York Times

Grog Full Metal Paint Refill 200ml - Burning Chrome Blue The flow of ink isGrog Full Metal Paint Refill FMP200ml is a marker squeezer dripper paint ink refill made with the artist in mind. The Full Metal Paint (FMP) series has a reputation for not only highly impact colours for street art or fine art but is designed to withstand the elements and not fade. The perfect paint for most paint markers and drippers.