You'll have to scrape off the rest using standard 2- and 4-inch paint scrapers. As you scrape, you may come across nicks, gouges and actual holes that need patching. I've found the most effective ...

Save yourself time and energy by using a drywall scraper to paint your baseboards. In the video below, More Strong simply holds the flat edge of a drywall scraper against the top of the baseboard ...