Brilliant thanks, so I did just as you said, though I did use the needle nose applicator that came with the zap ca glue. I have to say I was skeptical but I applied it the length of the "crack" and let set for about an hour and half. I then sanded it lightly with 400 sand paper and then again with 1000 sandpaper. It has come up a treat. After this I oiled the neck. Naturally, there is a difference in tone of colour on the fret as I've just sanded it but it's filled the blemish good. I'll post a pic tomorrow. Cheers for the sterling advice \m/