"Jim Wilkins" wrote in message ...

https://www.open.edu/openlearn/ocw/m...able=1&id=3524

This describes the "Burning On" method of repairing a casting:
https://www.scientificamerican.com/a...ast-iron-by-a/

Perhaps the preheated base could be placed in a sand mold of a good foot and
filled in with cast iron using acetylene?

I've built up eroded starter motor contacts that way, using brass which
melts lower than copper. It also wears away faster but was easy enough to
redo. When I was practicing TIG puddle control I piled up a column of
aluminum about 4~5mm in diameter and 25mm high.