Quoted from High_End_Pins:It really depends on how bad they are .
Sometimes they require a nearly complete repaint,other times stripped,painted,decaled, cleared repeatedly.
On an apron like this it really comes down to preservation and living with a minor spot here or there because they are kind of like a can of worms.If you touch up a spot here or there it will be more obvious than the flaw because the age shows in the original paint and you just can't put that aged look back in there. Otherwise your are stuck repainting the entire thing when it is overall really nice for what it is.
These bally aprons in particular are something I avoid repainting when I can unless completely needed because the very fine lines and the small letters.Tough to work around neatly.
The Pinball Rescue apron decals are the best solution but they can no longer be purchased !!!
Thanks a lot for the detailed explanation. I am about ready to finish my TZ restoration and I had noticed that many of the aprons have some tiny missing blue areas in the center part of the aprons. I have been debating whether to leave it alone, try touching them up and clearing over, or using a decal. I think I'll go with the decal.