Workers covered a rigid aluminum-and-wood frame with polyurethane foam. Next, they molded semicured polyurethane casts to the structure and clamped them there. Black polyurethane glue finally bonded the casts to the structure.
Workers covered a rigid aluminum-and-wood frame with polyurethane foam. Next, they molded semicured polyurethane casts to the structure and clamped them there. Black polyurethane glue finally bonded the casts to the structure.