Anyone ever used muggyweld super alloy or something similar to repair pot metal?

[stephen4785]

Iv got a bunch of pot metal I have to repair on my cadillac and none of it is structural. I found this stuff on youtube and was thinking about trying it out. Anyone have any experience using this stuff? The metal I need to repair is 72 years old so it's going to be tough to work with.

http://www.muggyweld.com/alloy-1