hi guys

i bought my ST just under 6 months ago and am beginning to worry it has had some serious damage to it
when purchased it had the side stripes which i removed to find that the o/s back and front and rear drivers side panels had had a respray as removing the stripes left indents in the paint (but not on the drivers door)
i presumed from this it has had some minor damage and then a cheap respray (spraying over the stripes -.-)
however i recently decided to give it a deep clean so removed the back seats and as much carpet as i could without having to take off the plastics and i found this:





All this sealant looks like it's covering something and surely wouldnt be anywhere near this messy if put there form factory
Am i right to be worried? anyone got any idea of why its like this?!

Thanks for any help guys