What are some key design considerations and possibilities when incorporating epoxy flake flooring in commercial or residential spaces, such as color combinations, patterns, or custom designs? Can you provide insights on the different sizes and shapes of flakes available, and how they can impact the overall aesthetic and texture of the flooring? Are there any specific techniques or application methods recommended for achieving seamless and evenly distributed flake coverage? Additionally, can you recommend reputable contractors or resources specializing in creating unique and visually striking epoxy flake flooring designs in epoxy flake flooring washington dc, known for their creativity and attention to detail in this specific application?