I made a print of the phone holder at 100%, but my iPhone 6 Plus is so wide, it really didn't fit. So I made another print, this time increasing the Z dimension by 50%. I post processed the gray PLA to enable me to rust the surface of it. I watched the video that Shira produced of her Dragon Door Knocker, (http://www.thingiverse.com/thing:1458545) where she used XTC-3D and iron powder to rust and polish her design. I used them both and skipped the sanding/polishing step and went right to the rusting stage. I painted on a mixture of hydrogen peroxide, salt and water to achieve the effect. It doesn't look like plastic anymore!