Thanks guys, I did try reversing the technique as per Julians thread but with not much success. I am going back inot Style Builder and scale with the ruled stlye a bit so it is not so imposing....I am playing around with a few other stroke styles for this particular purpose so I will post when I have had time to play.
Also, the freehand style is one that i have downloaded, just changed the color.
As for the technique, All i have done is exported one style as "hidden line" as a PNG and imported it back into the same file as a watermark....
