"jim" wrote in message
...
Son - in - law (ex to be) decided to do this old guy a favor and
drywall the cottage mud room. Left the plastering / mud to be. Only
problem is that in several joins he did NOT butt the tapered edges
together. Thus there is no "groove" in which to fill with mud and
feather out for the smooth finish. Any way to remediate this other
than rip it out?

?!?!?!

You'll always have some joints that aren't depressed. You just mud and tape
then as usual. It just means you'll have to mud a lot wider to make the
joint less visible.