Pro Tip: If you are returning to the project within 16 hours, you don't need to sand the floor. The epoxy will still stick to the next layer. But if it has been more than 24 hours, use some sandpaper with 220 grit and then clean up the dust with isopropyl alcohol or acetone.
The Flooring Epoxy Midcoat is what we use to create metallic marble floors. It needs 3-6 ounces for every square foot of the project. For a dirty pour marble floor, you'll need more epoxy per square foot. Mix the Flooring Midcoat for 2-4 minutes with a mixing stick or drill with a paddle mixer in a 2:1 ratio. Divide the mixed epoxy into three different cups and add colors to each one - one should be your main base color and have most of the epoxy, while the other two should be accent colors and have less epoxy. When all three are tinted, you are ready for the next step!