Day 5 of @Greg’s Garage #WELDA challenge, and I didn’t make it to the shop to work on the lathe, but I found some footage of a weld repair I did some time back.
I used a cast iron filler rod to repair a cast iron part. My welding instructor showed me this technique, and I had to special order the rods for this job, as they are not a common item in the stores.
This is an alternative to the common method of using a high-nickel arc welding electrode.
Here is a link to the product I used: