hi i wonder if glued canvas to wall is also ok on a strait gypsum ceiling.

i don't see why not.

To play safe - put a coat of high quality oil primer.

thanks a lot for your answer,
i have one more question please

the ceiling is too big for one piece of acrylic psinted canvas
and now i have to glue maybe 3 pieces of canvas one next to each other,wallpaper man nows how to do it good,and im asking what to do if i still see the stitch(connections).

thanks a lot

e

well, you will have to "correct - inpaint" those spots until they are not visible anymore.