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I've been reading up on different gear coating methods lately, specifically focusing on their long-term durability. It seems like there's a huge range in how long different coatings hold up under similar conditions. DLC (Diamond-Like carbon) coatings are often touted as being incredibly tough and scratch-resistant, ideal for things like watch bezels or knife blades that see daily wear. But I'm curious how they really compare to,say,PVD (Physical Vapor Deposition) coatings,especially in terms of resisting chipping or fading over several years.
Beyond just the coating type, factors like the underlying material preparation and the specific application process seem to play a massive role. A poorly applied DLC coating probably won't outperform a well-executed PVD one. Has anyone had long-term experience (5+ years) with different coated gears - maybe on tools, everyday carry items, or even parts in machinery? I'm especially interested in seeing some real-world wear comparisons rather than just relying on manufacturer claims. Are there any coatings that consistently punch above their weight class in terms of longevity?