On Nov 2, 12:10 pm, "EXT" wrote:
You will never get it to look level because there will always be that 1/8"
difference between the areas. You should have pulled down the 3/8" drywall
back to a solid divider and installed all 1/2" material.

That said, I have "adjusted" some "bumps" in a ceiling where a beam crossed
an area a little lower than the ceiling joists. This took a lot of compound
even when I used a slightly dried pail to fill the deepest area to reduce
shrinkage and cracking. It took probably 8 coats to keep replacing the
shrinkage, fill cracks and to smooth bumps. I probably sanded off as much as
I left in place to keep it level. It did not want to level very well because
I was using a 4 foot straightedge to scrape the compound flat and to spread
the fill far enough to avoid a shadow line. It worked for my needs in this
particular area. Your results may differ because it is an open room and
windows may emphasise the difference between the levels. You can either
change the thin drywall or do something similar to what I did, hope the
results are acceptable to you.

-

Thanks for the tips.
If I pulled down the rest of the 3/8 rock, I would have to paint
pretty much the entire dining room and adjoining living room archway,
more work than I wanted to do. I'll give it some more coats this
weekend.