How to finish an arched doorway? any tips... its framed and the walls are up... but the underside...

any tips... its framed and the walls are up... but the underside has me looking for thinking...
I want to paint my room surrounded by...
Answers:    this is why i make the big bucks!
cut the dry-wall, any concentration you choose , into 3 inch sections on the put a bet on and don't cut the paper on the bottom. this will contribute you your bend. now finish beside this dap spackle. i use this because it dries really hard and is effortless to sand.
Why are in that handprints sticking on our...
Depends on radius/arc, also type of trim to be used. I used 3/8" plywood. Scored the back near circular saw about 1/4". It should conform to arc. If not pliable satisfactory, try soaking first. I then cut my own trim out of 3/4" pine. They also engineer "wiggle board" but not much different later method described above. There is also 1/4" sheetrock also called "pizza board" which should bend suitably. Then you can use flexible corner bead, spackle & paint.