Today I took some photos of the underside of the car, you can see there's not a lot of ground clearance, as my hand barely fits, although it looks much bigger because of the surface where it's standing (I was doing some work earlier and I removed some of the stones and some ground). On the other photos you can see that it has some plastic covers, specially on the sides.
Note: that ugly gray thing is some polyurethane to fix the underside because the screws were falling off as the undertray hits bumps or water when it's raining hard, things like that, and to seal some gaps.
What can you recommend to improve the underside? A full flat underside? or just leave it that way?