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pic, paint smudges?

1178 Views 2 Replies 2 Participants Last post by  oscarMadison
What causes this? Just walking into the room you don't notice it except at certain angles. It appears to be small patches that were painted over. Likely someone was trying to cover one the many nail holes a previous owner put in. Is it just cause of the patch? Or is it more likely that they did not prime before painting over the patch? Or something else? I'd like to avoid this in my work.

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Looks like no primer to seal the wall repairs. Sand if needed, prime then paint.
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