Small Gouge/Dent in Sentra. How Do I Fix It?

Does the gouge break the surface? I had a couple of small marks up to a couple inches long, like someone accidentally rubbed a pen cap along it. After painting (Silver 3.0) I could't find them if I had to as the paint filled them in.

Incidentally, within a day of it hanging the painted screen my son (21 months) attacked it with a couple screwdrivers filling in for drumsticks. He mde a couple of hits before I stopped him, and I can't see it and already forgot where it happened. I'm sure I could find it on close inspection though.

Well first off, both sides are usable so how does the opposite side look?

A "gouge" would seem to indicate material has be displaced, not just depressed.

If you can take your fingertip and when moving it across the blemish feel the skin dip into the wounded area and hit a "ledge" on the opposite side, it needs fixing.

In this case, most likely 2 very light applications of "Slow Dry" Drywall compound would be best. The first to basically fill, and after it dries, another to "level". After you apply the 1st dab of mud and scrape it level, take a slightly dampened cloth and carefully wipe away the excess mud outside the depressed area. On the second coat, VERY LIGHTLY sand the perimeter edges of the repair first, then "barely" sand the center. You will need to prime the Sintra now, so the repaired spot doesn't stand out due to having a different paint absorbency level. However the repair should look virtually invisible before priming.

In the end, all you will have done might only to serve to make the blemish "almost" impossible to see except under the brightest light and closest scrutiny. That's certainly better than "I can see it more often than not.", and worlds improved over "I see it all the time!".