The cases in focus are: the metal from the trays I have been given to create pieces for the family from; and the treadle for our Lightning Jogger letterset printer.
As you can see from the photos below metal from one tray suddenly split after three annealings and hammering whereas the others have not. I will decide what I can do with the split bowls.
So I decided to repair it by bolting steel plates on both sides of the treadle and across the break; and fill in the spaces and gaps with "plastic steel". The photos show the process and the treadle bolted back in place.
The challenge with breaks and splits is how to ensure the repair or added design element fits with the original piece. I think the press repair fits with the industrial look of the press. A coat of black paint and it will look like part of the original and possibly stronger.