Yes they are the ratchet strap rings.

OK this is what I'm facing. The van is ex-Royal Mail - I have the fsh, MOTs, I've looked it over, I've also looked at the driver logs that they left in the van!! so it hopefully hasn't been annihilated like some vans are but I'm having a proper inspection done anyway, while it's in warranty. In the first photo, the non-slip rubber lining is thin and has had the ratchet strap rings bolted on top/through it and through the wood. At the edges of the doors is the metal edging strip, also bolted straight through. Both the rings (6 in total) and the edging strip (one for the side door, one for the rear) have star shaped screws which I am not able to remove. You can also see a large gap between the lining/ply and the metal which sealant won't fill! That second photo is a lot smaller!
In the third photo, the wheels have a plastic cover which is not fixed and I can probably rip out to paint the metal. The dirty white covering is top to bottom on both sides of the van (not including the SLD which I think has a thin wood lining) and you can see in the middle it's screwed/bolted in place. These are circular and I can see no way of getting this out, so I will have to cut the white material out, leaving the metal and black trim in place, then hopefully fit some ply at a later date. At least I can then clean the sides, seal the floor properly and paint the sides.
I also have a lot of condensation on the ceiling, one of the plastic wheel arch cover is wet from the drips, which won't be helping my plight.
Am I going to keep the van 10 years? Possibly not. But I think I will just have to do the best I can with regards to removing the material on the sides and the plastic wheel arch covers, clean the sides and the floor, seal it up (and in the case of large gaps, run sealant along the edge of the ply and when dry paint the Protecta-Kote over it) and then paint Protecta-Kote over it all.
Does this sound like the best plan for me?