Leave the rot where it is and weld new right over it. Just knock the paint off before you weld. Doesn’t have to be pretty just cover the hole
This. It's a repair not a Picasso
Belay that,,, cut that old skin off crap will build up under it an force it into the blades, when the blades start chewing on it and spitting it all over the pasture not to mention cutting tires cutting hooves and stuff similar,, cut that old crap off then weld a piece in place easy job to learn on,,
