This planter looks killer!  It was super easy to accelerate the weathering as well.  I used the mix: 16oz hydrogen peroxide, 2oz white vinegar & 2tbsp of salt.  I used up one full sprayer over about an hour period of applying.  Just mist it on heavily and come back in a few minutes when it is drying and hit it again.  [Make sure and remove the 1/2" Styrofoam insulation on the inside walls before weathering it... & replace it after.]  I repeated with another half sprayer of solution a bit later in the day.  I laid it on its side (as a review stated) so the solution sat on the main face longer (the small sides did fine vertically.)  I did not weather the back face since it will sit close to the facade of my house.  [TIP - Use the box it came in as an underlayment when weathering.]  Received it Friday, weathered it Saturday, and planted on Sunday.  Enjoy the photos!