Once it's taped off, the painting can begin. Maria said, "We decided that black was to [sic] dark and sharp as a contrast, so we mixed a darker grey colour. The paint is a mix of acrylic paint and a chalk paint, to give it a not so glossy finish."
After finishing a section, the tape can be removed. She said, "Make sure to press the tape very well down before you paint, avoiding blotches and noses [sic] doing so. But even if you have some slight uneven lines - the end result will be great, because the Death star has so many little bits and dots, it will look like you wanted it this way."