Pot metal repair ...

1) drill out EVERY pit
2) copper plate the part
3) fill each pit with solder
4) blend every pit to the original surface
5) copper plate the part again
6) check for imperfections - repeat steps 3 to 6 if any found
7) buff and nickel plate
8) chrome plate
9) hope to hell the part is perfect for the money charged !!

VERY labor intensive !!