A mirror finished planter box is one of the most luxurious planters that one can buy. There is no easy way to make this, it must be welded, polished and then mirrored. This is the only way. So next time you see a mirror finished stainless steel planter box, look at the details and think of the amount of labor that went in to the construction. It will surely make the always high price tag seem a little more logical.