When using Rust Bullet Concrete coatings on your floor, roller marks generally appear because the thickness of the coating is not even throughout. When rolling each section, watch the already coated sections for roller marks. If they appear, take the roller without adding more paint, and with no pressure on the roller handle, roll over the coated surface to even the coats out. For continuous issues with roller marks, pay attention to how much paint is being applied at one time and make sure the coats are thin and even. Also, use a clean, dry roller and lightly back-roll over the coating. This will generally even the coat out and hide roller markers. Rust Bullet Decorative Flakes are also a great way to hide imperfections in your concrete floor, including roller marks!