The different levels will still show through the new paint.
How To Sand A Wall That Has Been Painted. For some people, sanding the walls another time would be the least of their worries. While sanding is not required for every paint project, rough spots on walls, whether they have been previously painted or not, need to be sanded before they are painted to ensure the paint goes on smoothly.
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Sanding is easy, but it is important to know some aspects to consider to have better results. Sand the area and patch any damaged areas with spackle or wood filler. Bathrooms are notorious for having no windows, and ours is no exception.
If an early coat has a drip that solidifies and is painted over, you're left with a lump in the remove the drip of paint from your wall.
Any paint bubbles, having air pockets between paint and surface underneath will scrape up very best way how to remove old exterior paint depends how much you have to scrape, as there are a good long handled wire brush a couple of dollars. How to prime before painting drywall. That said, i have seen painted walls that are abysmal. How can i paint a good background in a painting?
