Hello Hobby - 4pc Variety Craft Foam Brush Set, 1", 2", 3"

Tape the edges of the door frames as best you can, then get a foam paint sponge and start at top and work your way slowly down to the floor. You can get a pack of the paint sponges for just a couple of dollars at Walmart. https://www.walmart.com/ip/Hello-Hobby-4-Pc-Foam-Paint-Brush-Set-1/2432554472 https://www.walmart.com/ip/Hello-Hobby-Variety-Craft-Black-Foam-Brush-4pc-Set-Adult-Teens/2473289587