Gday all .. thought it was time for a progress update.

I've just placed my 1st order with PBR (a pretty big order too) and most of the parts will be going into this game including:-
Pop Bumpers : New rods/rings, caps, bodies, bases,skirts and spoons
Flippers : New rebuild kit , flipper covers, coils and cabinet switches
New rollover buttons , ball hole kicker covers, coil sleeves and stepper springs and coin door lock.

Now for me thats the easy part .
The next step is the playfield touchups which I've never done before (read a lot though), and would really appreciate your suggestions on best way to do this .

Here are examples of what most of the areas needing touchup work look like now.
The question is do I do this with a very fine brush (to fill the lines missing paint) in the areas where there is artwork (such as the cards etc) and for the areas where it is just one colour with no artwork use a sponge to blend the new paint with the old ?