Installed matte silver piping earlier today. The matte silver matches the stitching in my truck nicely. Thanks to everyone for the idea and for the tips! The fronts went in smooth as butter. Literally took about 10 seconds each. The rears on the other hand were a pain in the butt, as seems to be most of y'all's experience. After trying and failing to start from the edge of the door and work my way in, as I had on the fronts, I eventually had to line the piping up and try and find the "weak spot" in the groove between the plastic and leather. On each rear door, there was about a one inch spot somewhere along the seam that the piping slid into, at least partially. From that weak spot, I would then work my way out on both sides. Used a plastic windshield ice scraper to wedge the piping into place in the difficult rear doors. Very pleased with how it came out in the end, especially considering it only cost me around $12 including shipping!