Quoted from desertT1:
New clear over those two games seems fine if that's what you wanted. However, on this playfield, there are clear issues. What options exist for dealing with the current clear?
It is no different than dealing with an older playfield that is flaking and having issues. Clearing the playfield before beginning restoration work on it is SOP. The clear "locks in" the flaking, etc, so repairs can be started.
Clearing/re-clearing a playfield that has chipping issues like this GB is no different. Sand and feather the parts that have chipped off, carefully sand down the original clear as far as you dare, repair any art as needed and clear. Then wetsand. If more clear is needed to level the playfield then clear again and wetsand again.. I have had to repeat this process as many as 4 times on a NOS playfield. But then I don't put my clear down super thick because I don't want to have issues with solvent pop.