Do you have to remove old paint before repainting?
Scrape Off Old Paint Tempting as it may be, do NOT paint over old paint.
So, in case it wasn’t clear: do not paint over flaking old paint.
If you have walls that are peeling paint, pick up the scraper and remove the flaking pieces, no matter how long it takes.
This will prevent the newer coats of paint from flaking..
Can I prime over paint?
Oil-based paint will not adhere to your existing latex paint layer, so you need to create a middleman, of sorts. A thoroughly applied (2 coats is a good idea) primer will allow your new paint to bond to a new layer, which is specifically formulated to bond with your new paint.
Can you just paint over chipped paint?
Old paint can chip, flake or peel, leaving behind cracks and small holes. This can’t just be painted over without causing future problems. You’ll need a paint scraper, wire brush, sandpaper and a primer. Depending on the size of the repair, use drop cloths or a tarp to protect floors.
Can you paint over painted wood without sanding?
No, you do not. But you do need to properly prep the surface first. Wiping it down with a clean soapy rag is always advised, and you may want to use a deglosser. I choose to use an oil-based paint instead which will adhere to a varnished surface and is a great way to prep for a final coat of paint.