How to paint over wallboard with paper coating stripped off?
The answer is the one you cannot face. You need to skim coat the walls with drywall mud, sand, prime and paint. You shouldn’t need more than one or two coats. Take drywall compound and thin it with water, mixing thoroughly. You don’t want it runny, but it should float onto the walls with a 10 or 12 inch drywall knife smoothly and in thin coats. Add thin coats of drywall mud until the fuzzies are gone, sand, texture if desired, prime the wall, then paint.
