If I were to try this I would look closely at an industrial epoxy called Belzona. It is unbelievably strong and long lasting, can be machined, and is used in the repair of cracked engine blocks and many other "salvage" repairs to steel. One caveat, it's not inexpensive.

https://www.belzona.com/en/products/purpose/metal-repair.aspx

Good luck. SRH


May God bless America and those who defend her.