A Deep Dive Into Repairing a Car Headliner Anyone who’s spent time in the automotive or industrial equipment sector quickly learns that interiors — especially car headliners — are both delicate and oddly forgiving. Over the years, I’ve handled my fair share of vehicles with sagging or stained headliners, and frankly, the fixes range from slapdash hacks to surprisingly neat restorations. Now, “repairing a car headliner” isn’t just gluing fabric back in place. It’s about understanding the substrate, the foam degradation, and fabric choice. Oddly enough, many folks underestimate how much that foa…