I've rebuilt a couple of these Smith's heaters.
My starting point has always been a new core from Holdens (made by Claytons)as I've never come across one which doesn't leak and given the age of them they tend to be pretty crispy by now.
The biggest problem I faced was the pivots for the flaps which sheared off. Removing the remains was a bit tricky and so I used some stainless wire to make new ones.
I delicately bead blasted the casings and then used VHT crackle black paint to finish it.
Arwyn
That's almost exactly what I've done. The core's on order from Holden's and I'm going to replace the sheared hinges on the flaps with brass panel pins.
