Cast Iron Welders

I know you can weld cast iron but never seen something this small done

Not sure the best approach really on something that small but yet needs to be very strong for the handle to last 

Will be incredibly difficult, cast iron isn't the easiest of things to weld especially that size. Needs a lot of attention. But everything is weldable to an extent. 

Cheers guys, I wouldn't bother if it wasn't the fact they were scripted porsche door handles 

chemical metal or the likes?