~One man’s opinion / observations ~
Apply Scotchguard 3M masking tape to the trim and wax the metal, remove the tape and use Autoglym Bumper dressing on the trim (if you get any wax on the trim it can be removed with Groit’s Wax Remover)
~Hope this helps ~
* justadumbarchitect so I question everything *
Experience unshared is knowledge wasted…/ Jon