pop goes the weasal.....fix

[mongocanfly]

I need some advice from the gurus....
I'm currently body working my doors and found this today.....the door panel has a few depressions. ..you can see from the pic the guide coat shows 4-5 shallow spots...on the lower depression where the blue tape is, if I put thumb pressure on those spots the panel pops....a lot louder on the left than the right...I checked all the low spots with a straight edge and there's not much of a depression except for the lower one, its about .040-.050 ...what do I need to do to this panel.....I assume more than just slabbing filler all over it...