Well, i'm no expert, but the previous owner of this Machine was none either!
Even the clear coating seems to have been applied directly with the fingers!

But I'd say no to the painting over clear coat!
You'll have to get into the real thing, my friend!
That's when Vids' guide comes in super handy!

Maybe they used the wrong screws to mount the flipper bracket

That's a possibility!
You should have a look under the playfield!

Looks like someone "slipped" with the screwdriver and scratched the playfield.

Well that's a huge scratch for a screwdriver!
And that's two, actually!
The guy must be super clumsy!

I bet someone found an exact color match for those touch-ups with acrylic paint, but didn't count on whatever clear coat they applied over the top of the touch-ups darkening the acrylic's color, which tends to happen with acrylic paints (at least in my experience). I have about 100 bottles of acrylic paint in my workshop, and when I do touch-ups I have to experiment with several lighter shades of the color I'm trying to match, in order to get the right shade when clear coat is applied.