I'm very interested in this thread as I have a White Water that I intend to restore aswell.
Your playfield came up really nice but aren't you worried about the touch ups you've done wearing through again?
Just wondering if you considered having the playfield clear coated?
That's what I intend to do with mine becase of the whole touch up paint thing.
Top job on the resto so far by the way.

There is no need to do a full CC, so I tried get away without going overboard.
As the touchups are small, I CC with automotive acrylic which after a few weeks sets hard as a rock, all I have to do is usual maintance clean and polish with pure carabuna wax and touch up will be protected forever.
I have used this method in the past with no problems at all.