The overflow drain in our bathtub rusted out and left a disgusting hole. I made this to cover that eyesore. I attached this to the tub with two part epoxy. I left a cutout for the water flow.
Because I needed a fine finish to paint, I used a casting product applied with a brush. With a super smooth finish, I painted the cover with silver metallic paint, then casted it again the next day. Left me with a smooth painted surface, that wont scratch off.