I'd recommend reading up on all the flat strokes in the wiki and trying them-the ones where the blade doesn't leave the hone- and see if any of them hit the marker edge. If that doesn't work you could try the strokes where you lift off the hone, like the rolling x stroke, but be really careful if you have to go the lifting route, that's a difficult stroke, and I can't really say I think its a good idea to try your first time honing on a new, expensive (I assume) razor.