The ready-to-use squeeze pens feature brush and chisel tips that can be filled with water or almost any liquid ink

Why not try to use the spray paint in combination with the MTN Water Based pens

The Sharpie Fine Point markers are filled with alcohol based permanent ink and works on most surfaces

Grog Black Magic Ink 7ml

A so-called squeeze marker from Spanish MTN

mtn systems german s bahn Painting on stones The ready-to-use squeeze pens featureReplica of a German S Bahn in cardboard that you can paint and then fold together as a 3D model. You can paint or draw with pretty much any kind of marker since the train is made of cardboard, but we recommend water based acrylic markers. The model is about 43 cm x 10 cm x 9 cm when it has been folded.