Nothing but constructive criticism over here.
What happens if you apply a second coat to the red? Does it darken to your satisfaction?
Otherwise this could be your opportunity to select an acceptable red in Rustoleum.
How did the red paint you ultimately selected compare to the red under the front legs?
I'm a stickler for original, the way it came from the factory. That said, I would remove an operator sticker. As long as it is adhesive alcohol and/or lighter fluid are your friends and will not affect the original screened art while removing the sticker adhesive. Still, with your example, you would need to touch up the art because some is missing. Depending on the level of restoration you want I look for a better, excellent condition, original instruction card holder. You can also refinish yours with the pinball rescue decals.
Assuming I'm interpreting your comment correctly, the beauty of a train wreck of a main or head relay board is the proper correction of the defects is obvious and really quite satisfying to execute in my eyes. In the end the relay board should appear "as built" from the factory when you are done with it.
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