New answers tagged repainting
For small spots and ink or crayons, once you have removed as much as you can, allow to dry. Hit it with "White Out" Nothing dries faster and stuff doesn't have a chance of bleeding through. I used it The first time out of desperation. It's been a real handy go to as it's cheep and I always have it around. It works great on small jobs.
I have used oil based indoor paints many times outdoors. Mainly on sheds. The only issue I have had with it is an extreme amount of discoloration. Bright blue turned to really dull pool liner blue, off white turned to dirty-light-yellow. Honestly I would leave it be for now. If you painted over other latex it might just fall off once it fully hardens ...
Most exterior rated paints incorporate UV inhibitors to protect against the suns harsh rays, while interior rated paints do not. So id expect discoloration and premature deterioration.
Maybe this hasn't been mentioned because it's too obvious, I don't know. If you're trying to get a crisp line without tape (maybe between wall and ceiling, semewhere non-critical, or maybe you have steady hands), orient the brush correctly for best results. Instead of orienting to use the width for a wide stripe, turn it 90 degrees so you are painting a ...
Answer: yes, if scraping and thorough sanding (coarse, then medium, then fine grit) until smooth does not remove the old paint than feel free to prime and paint right over it. Do not pay attention to those that say "you must test for compatibility with the new paint" or "don't paint it with latex (water-based) paint if it might be old alkyd (oil-based) ...
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