These are a series of Paint Pens - paint in the barrel. I used them to edge my mount board for WormHole and because I was bored, run the blue one around my Ruin Church - to see if it would cover foam core.

So you are looking for Posca Paint pens by brand or just a paint pen (check the coverage with the tester at store with a off cut of F-Core).



Lord Abaddon of Wormwood

Having a humongous pile of white foamcore I often use brown or black acrylic paints - the cheap Ceramcoat and Americana brands - to do edging. No problems.

The Auld Grump

I use the markers to edge to cut edges of the foam itself. Like I said, it works fine. It might be a lighter color than the edged paper. But its not like the foamcore is usually seen, so anything other than white works perfectly well. Its a good way to use up all the crappy no brand markers I buy to experiment with.