Was working in below the car yesterday having a look at all the plugs and removing sealer that was loose wasn't going to touch these plugs but glad I did because this is what I found.
Pictures are not that great because I was that near to the car but it started like this. Plugs are below the sills

Pulled it out to find this

that ended up like this

and another one

time to get the Q-rust and Zinc primer out