Abstract: A marking pen having a deformable tip, and adapted to apply ink or the like to a surface in a stroke of uniform width. The deformable tip has a pocket or recess in its marking surface, that allows a leading edge of the tip that is applied to a surface to be marked, to remain substantially a straight line during the marking stroke, rather than curling at its edges and producing a stroke of lesser width. A scraping blade is also provided carried by the pen, preferably by a cap for the pen, and can have barbs that securely engage it in a recess of the pen or cap for the pen. The invention is particularly useful in marking numbered zones of lottery cards, and in scraping away opaque layers for instant lottery cards or tickets.