DIY Faux Window Grids I’m thrilled to share a fantastic solution I found to give my mudroom door a stylish update. The original white interior grids on my mudroom door didn’t quite fit the look I was going for, so I decided to try using some Automotive Car Molding Trim! The trim was originally black, but I wanted it to be the same color as the door. After applying 3 coats of paint, and letting it dry overnight, it was good to go. I measured and cut the strips using a paper cutter. I wanted the e