Re: Drywall Bump - Please HELP
Really, the only way to fix a bad drywall joint is to remove all the tape and mud and do it over again.
You can kind of hide it by adding more mud, thin in the middle, thicker halfway to the edges, thinning out at the edges to make the bump have less slope. Sheetrock mudding is an art form and unless you are a sheetrocking prodigy, you're not an artist until you've done a million square feet. (I haven't even done a thousand square feet.)
You can reduce the visibility of the problem by making sure there are no lights on or near the wall which can cast long shadows along the wall. With a light source close to the wall, any irregularities will be highlighted by their long shadows.
On the other hand, you might be able to wash the wall with light (track or cans), making sure the lights are at least three feet away from the wall. (This should be an easy experiment.) Installing wallpaper with a pronounced pattern will also minimize the appearance of irregularities.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.