YES! He actually listened to me today when we had a Teams meeting. Told him straight the MDF is never going to work and we need either marine ply which we would need to seal or strong plastic Sheeting. He asked me to price both up and I suggested using one of the replaced Covid screens in one of the offices. He agreed this would be the best solution. They are 9mm thick, triple laminated sheets so will be perfect. Cut them to size, fix to support posts, glue on the sign and job's a goodun'.