I think you've got this backwards. Grease is exactly what you want in open systems. Yes it does trap particles, but it moves them away from wear surfaces. Think differentials and drivetrain components. The only downside is you eventually lose grease and have to refill. In closed systems we generally prefer oils with a filter system. Think car engines. I do like dry lubes for chains, but grease has been the traditional answer for open systems for a long time. Grease will be just fine for a garage door.

💯. If you want this level of sturdy, look into hunting packs. Cordura still exists, it's just getting harder and harder to find at REI.