How To Paint Over Very Old Wallpaper. Paint over the wallpaper with an oil-based primer to protect it from moisture in the plaster. Once the wallpaper begins to bubble you can begin removing the wallpaper.
Adequately ventilate the room in where youll be painting over wallpaper and dont forget to wear protective gear. Skimcoat by swiping the thinnest possible coat of drywall compound. Thankfully painting after removing wallpaper involves just a few simple steps.
Scrape off any loose or bubbling wallpaper with a wallpaper scraper.
Its essential to get your wallpaper ready for those colorful coats of paint by priming. Moisture from paint can often loosen wallpaper glue causing bubbles or peeling. This helps seal the adhesive in the paper away from the moisture in the paint. Skimcoat by swiping the thinnest possible coat of drywall compound.