[cabmandone]

Knockdown is tough to blend and not have the repair noticeable. You can buy cans of texture spray at Lowes, Home Depot, Menards

https://www.menards.com/main/building-materials/drywall/wall-ceiling-textures/homax-reg-water-based-knockdown-texture-spray/4065/p-1519716771355-c-8198.htm?tid=115880770009278399&ipos=3