Walls and Ceilings - Drywall Help

hi everyone

well I started a room renovation a few months ago and everything looked great I putted the mud and sanded all three layers of mud and I painted with primer first and a few days ago I started painting with the color na d started to appear abnormalities in the drywall I think I should have sand a little more also there are lines showing between each sheet it's like a curve it can be seen with the light so what can I do this was my first project, should I just do it again all over? if so then how can I take the sheet rock off?

thanks

John

You may have to. Place a 12" drywall knife across one of these joints and see what it tells you. Most likely you built up the middle and didn't feather it out to the sides with the 12" knife. You may be able to reapply compound to the area and recreate the feathering needed to give a smooth finish.

thank u very much I'm gonna try that, I always feel that I forgot to do something and I think I might've forgot that

John