My bathroom was painted on top of the drywall w/o the joints being taped, patched &sanded...nor primed?

At this point, how can I prepare the walls to achieve a smooth surface on which to paint a mural?My bathroom was painted on top of the drywall w/o the joints being taped, patched %26amp;sanded...nor primed?
As an Artist/Muralist; among other things; I'm curious about the Paint you'll use for a Mural?





Also after installing thousands of sq. ft. of drywall, and applying thousands of gallons of paint; I'm really curious about WHY the bathroom was NEVER ';Finished'; and how you define DRYWALL, and in what areas of the bath?





Certainly not IN a shower/tub area I hope.





The answers to finish are valid; even over painted/ UNFINISHED drywall. I'd still question those issues I mentioned above.





Without any knowledge of subject matter or your idea for a composition; the wall will still have to be finished to a ';SEAMLESS'; appearance. Priming as a top coat is probably a valid idea, but I suggest using a FOAM roller cover for the smoothest finish possible.





Steven WolfMy bathroom was painted on top of the drywall w/o the joints being taped, patched %26amp;sanded...nor primed?
Lightly scuff the existing painted surface with 100 grit sand paper. Get some tape and joint compound and finish the seems like they should have been in the first place. Prime the entire wall surface and voila!
Go ahead and tape, patch and sand the joints. (If you have a glossy paint you may want to prime those areas first.) Then, prime the entire wall and paint.
you can re tape and bed the corners on top of existing finish. in drywall work, corners are the hardest part, and will require that the tape be done correctly, sanding, another float and more sanding. then possibly another skim coat and light sanding.





once you are satisfied with t%26amp;b work, you can seal it with a product like kilz, or just use a cheap coat of paint. then you can do your mural.





man, i wish i was there i would have it ready in a day or two! GL with it! jk.
You need to mud tape and sand the joints, if you don't the temperature changes will cause whatever is in between the jints to crack.
If you are putting up a mural that will cover the whole wall you do not have to tape and sand. Just fill in the seam's with compound and sand down. Put primer on seams so the mural will not stick permantley to the seam. and than go for it it should be fine. I have been a wall paper hanger and painter for 20 + years. this will work. and a lot less work.