You could add a washer.

Make sure the sharp lip of the washer faces upwards, and use a tiny drop of Loctite (blue) to keep the screw from becoming loose.

Would one of those plastic / Lexan washers that are generally used as plastic protectors work for under this . I'd be concerned about a steel washer causing a dent in the playfield . You wouldn't want it to stick out too far either otherwise it may change the path of the ball .

That's why you use a tiny amount of Blue Loctite. It will hold the bolt, but not in a permanent way.

When posts get loose, they chew up the surrounding playfield.

A #6 washer will normally be very thin.

Does that post screw down directly into the playfield timber ? or does it screw into a T-nut under the playfield ? .

If you go w/ a washer, I'd go w/ a stainless steel one. They tend to be thinner.

Just had another thought regarding this that may work . Could you change the post to one of the plastic star posts ? I just noticed my Avengers has the star ones from factory , Tron doesn't but I know of people who have put them on that . Thinking it might work here too . Would have to check clearance with the ball going down the return lane behind the slingshot .

These type :

http://www.pinballlife.com/index.php?p=product&id=2865

Also here's the clear plastic washers :

http://www.pinballlife.com/index.php?p=product&id=223

Speaking from experience, star posts will affect the inlane feed in an unpleasant way typically

I'm not sure why. The part of the star lost that gets the rubber is the same width as the post that's there. The change is purely cosmetic since the ball cannot touch the post below the rubber. If it were me I would put star posts on this game in each side.

It's not - at least not on the set I have.

I switched my slings to star posts on Metallica back when the slings were causing airballs all the time. The inlanes were much more difficult to get balls in, and the idea of a 'power inlane' was completely eliminated. The sling switches also had to be gapped slightly differently.

Be sure to not get loctite near the Plastic because it will attack the plastic and cause small cracks in it, making it brittle.

To totally cover the cosmetic imperfection, replace those post covers with star posts. It will protect it from further damage and also thee slightly larger star posts totally cover over the small paint chips so u cant see it at all anymore.