If only on the front----might save a nasty gash----that tin makes a nasty cut on the fore-head----use treated so it will last---want cost but a few dollars for the front side.Thanks. Not a bad Idea there. I have exausted all of my used lumber, so I'll have to buy some, if I want to do that. I built it all with used wood savaged from other projects. I just had to by three sheets of OSB sheathing.