Substitute this bulleted step for the other red-bulleted one to make the tarnished version.

bullet Tarnished Variation

Turn off your noisy "Environs" layer by clicking on the eye icon next to it. Turn on the sedate "Environs" layer copy that didn't have noise added. Set it's mode to Overlay this time, and adjust the Opacity until you think it looks good. In the example it's set at 75%.

bullet When you finish, close this window and continue with the final steps.