The optimal surface for projection is a white one, as it reflects light most effectively. However, light-colored surfaces, such as pink, yellow, light blue, and green, are also suitable alternatives.
Conversely, mirrors and stainless steel surfaces should be avoided since they reflect all of the light, potentially distorting the projection. Additionally, items displayed in cases, on shelves, or in shop windows can serve as excellent surfaces for projection, offering unique and creative options for showcasing your visuals.
I hope this revised version meets your needs. If there’s anything else you’d like to adjust, feel free to let me know!