On 2012-11-14, newshound wrote:

On 14/11/2012 14:22, Nightjar wrote:

Heat to cherry red, then plunge into cold water.

I'll try it.

To be sure, fill the annealed tube with Wood's Metal, bend to shape,
then melt the Wood's Metal out by placing the tube in boiling water.

Woods Metal not cheap

Let me put it this way: I spent less than £2 on the hull *and* I got
to eat the kippers.