Boot things
 

Been doing a few bits around the boot area today and noticed a couple things , first where the rubbers ether side of the boot lid touch the boot iv got to bits of rust is there any easy way to fix this or make it look better or is it going be a professionals job and also this white plug just sitting there what's this for ? I'm having the open door symbol slightly lit up all the time is there a sensor for the boot some where ?