Coming along nicely... Interesting to note you are using the original boards - and they work
Just make sure you do the ground mods, and replace connectors if required. The 5V capacitor on the power supply should be replaced. Just my 5c..
The woodgrain sections - I only ever sand down the section near the plunger. I use the end of an old billiard cue and wrap some 320 Grit and then sand the channel. Bit harder up the top. You could sand and then try some lacquer.. I guess Gavin or one of the the others could advise..
The ball arch plate - Hard one - I guess if you are game to do what Tony does - Prime / Paint - it would look great.. The apron would need decals - I feel there could be a viable solution in the future !