metal spinning

[johnthomp]

ive just seen a couple of interesting videos on youtube one of them was metal spinning and i just wondered has anyone on here ever tried this and can offer any advice before i try it for building copper and brass boiler caseings
also the other video i came across is just entitled hydroforming where it appears that a metal envelope can be inflated useing water preassure and wondered has anyone tried this before and would it be possible to use a preassurewasher for this method of forming
both these methods look cool and easy in principle and i would like to try before i get too old to have the bottle to do both i feel a learning curve comeing on

 

[4156df]

First let me say I'm a rank amateur, but I showed a little spinning for the steam dome on my tractor. Check this post:
http://www.homemodelenginemachinist.com/index.php?topic=4335.60. If it doesn't go right to the steam dome section, look for Reply #250, Feb 13, 2010. I'll be happy to answer any questions I can.
Dennis