Accidents happen and it's not that hard to make a hole in your plasterboard walls.
How To Paint Over A Hole In The Wall. Those were the essentials of how to properly paint over a painted wall. Once you've filled and sanded a hole of any size, using the methods above, you'll need to paint the patched area.
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Using a small putty knife, spread a small amount (usually around the size of a pea) of spackling paste over the hole. Learn how to apply texture to a wall with a roller without using special tools or compounds. Once the wall texture spray dries you are free to paint your patch to match.
Some walls may have lead paint that can be potentially dangerous.
It shouldn't be all that difficult to paint it again. I recommend you get a pre mixed general if you are plastering a large hole over wood lath. Use the handle of your putty knife to tap the edges of your hole down. You'd be surprised how far a nice, light paint color can go in updating the look of wall paneling.