I finally had to lay down a bead I couldn't grind off, and it didn't do too badly.
Hard to see, far corner of deck internal shrouding had rusted into almost nothing; I just so happened to have
a piece of metal cut that fit in just perfectly. Scraped the surface junk and crud out, air blasted it, and
then did fine with a 7014 1/4 at 90 amps.
Not sure why, likely the speed I go (like a bad golf swing which I don't know how to play) seems to make the larger rod at 90 amps go
a lot easier than the 3/16 at 75 amps. Seemed to have less burn through problems, was putting down more material quickly enough.
Filling holes is sure hard. Plus the material often still has a hole in it after I've ground it. Likely why most folks just weld and don't grind...
Saved the best for last. Heavy metal to heavy metal. Two thick pieces need to get welded, then I'm done welding on this deck. Have to buttress one piece with angle iron; on both decks the wheel support either ripped out there or was repaired previously by welding so it seems that the factory did not make the wheel mount strong enough. Plus wing mowers tend to run into things...
Well, it will be strong when I'm done. More pics to come.