Second the idea that this may take a while... but alternative approaches to clear coat are available.
I know there is at least one thread here where someone was using the clear UV curable acrylic "nail polish" to fill in spots like that....
This assume a couple things- that the clear chipped off - looking at the pics you posted I am not certain thats the issue (at least not for all of the regions, the first pic it certainly looks like your missing material)
Its relatively common to have the clear delaminate from the insert- This is an easy fix- you can flood it with any number of products using a syringe and a fine needle- just stick the needle into the damage area and inject some cyanoacrylate (super glue) or I *think* people have used the UV curable nail polish for this as well....
if its just the clear pulling up (and not off) then you have a very doable fix- just a few hours time and some new mylar when your done. If the clear cracked off and comes out with the mylar- you can fill it with clear coat or the acrylic and carefully sand and polish the area without having to redo the entire play field.
I would investigate- if its bothering you enough to post it, you need to at least figure out what the damage is.
Finally- just beware- yes its relatively simple to fix if the clear just delaminated- but once you start down this road you are kinda going to need to finish the job one way or the other- if your careful I doubt you end up making it worse. Worst case you end up peeling mylar and clear coat over those regions lifts (you will not peel up large sections unless something is very very very wrong). Then you fill it best you can, sand (carefully mask) and use some wet pads to bring it al back to perfect shiny. If your coating with mylar again that will hide many sins so I think your OK.
Best of luck..