It’s a tough question, and you need to weigh the pros and cons, plus the cost for your vehicle. Although cheap drop-in truck bed liners might seem like an economical option, they don’t have great durability. Even with quality models, there’s always that gap between the liner and the truck bed where dirt and water can get in. Some people have removed a drop-in liner only to find the truck bed underneath is rusted through. A spray-on coating, when properly applied, provides a similar level of protection, and if there’s any damage, you can see it straight away and rectify it before the problem gets worse.