hello all, I am wanting to replace my detorating porch columns with the maintenence free vinyl type. I think I understand that process. I would like to wrap (or make maintenence free) the 4x6 cedar header that they will be supporting. that's the part I'm not sure of. what type of material do I need? how is it bent to fit? and can I do it with one piece? header is 12' long. thanks to all replies.