Right, and that's part of my point. You can't just let things degrade like that and "wait" until the next refurb. It seems to me that overnight daily PM just isn't as much a priority as it used to be.
I had, at the most, 8 animetronics, 60 some odd show lights and effects and 35 - 120 games that I had to maintain (or rather, my technician did), and I'd sit down with him every Monday morning and we would go through all the games and make notes on parts that were about to wear out, minor upgrades (like replacing metal speaker covers that like to get scuffed and dented with plastic ones that we designed and had a local shop produce for us), lights that needed replacing, general appearance and mechanics. The whole process was time consuming, taking about 2 hours, but then...throughout the week he'd fix all these things on scheduled PM days (if they weren't quick fixes we could do right then).
The point is...you don't wait until it's falling apart to fix it, because then it becomes REALLY expensive.
Think of it like a deck (and I know I'm preaching to the choir)...if you strip and reseal it every few seasons, it's going to last a lot longer, look a lot better, and cost a lot less than waiting for it to rot and then replacing it. Even if the replacement is plastic decking that requires less maintenance.