The Highfield isn't quite complete yet. The bowl has a significant scorch mark on which I just can't seem to get rid of, plus it has a crack/split which does seem to be getting bigger.Would there be any way of slowing the bowls spliting process, as using the two part adhesive that is normally used could damage the bowl further so a milder version may be required.
As for the scorch mark, I can't think of anything that'll remove it. There is Turps but I am not sure if it'll damage it as that is the only Hatfield bowl you've got unless there is a company somewhere that specialises in Hatfield bowls.