On Sat, 30 Jan 2021 11:34:53 +0000 (GMT), "Dave Plowman (News)"
wrote:

Looks like you could grind the welds down a bit more. Do they seem to have
penetrated both bits of steel? Looks don't much matter, but I'd need to be
sure the weld is strong. Covering it up with gobs of underseal is going to
make the tester look far more closely. And rightly so.

That's the main issue with MIG: you can't really tell! The truth is I
just don't know. I've jacked it up and belted it with a club hammer
and it ain't goin' nowhere. HOWEVER, whether it would survive intact
after a smash is another matter altogether. A complete unknown.