Originally Posted By: gunman
Grain lines in the metal from the original forging . You see a lot in wrought iron work .Not a lot you can do about them with out polishing them out and by that I mean file rather than mop. Even then there is a percentage that will probably always show .
All old ladies have wrinkle or two .


I'm not an metallurgist, but I believe we have a member or two that is. Possibly Dick Dup. He can probably give a technical explanation of the possible causes of these lines.

I know there are many different defects that can occur in forgings.