Step 1 · Prep is King: Get Your Walls Ready

First things first, clean your walls. A little Dawn dish soap in some water on a sponge will cut through any grease or grime. Let it dry completely. Then, look for any dings or nail holes; use a flexible putty knife and some spackle for those minor repairs. Once that's dry, give any rough spots a light scuff-sand. Now, the most important part: get all that dust off. I'll even take a damp mop to the walls to make sure they're perfectly clean. You can't have good paint adhesion on a dusty wall, my friend.