Stainless Steel Cleaner for stovetops.
It comes in a spray can, and it's meant for cleaning the odd stains that won't come off of your steal stove, around the burners, from all the heat and the cooking. It's meant for Stainless Steel, aluminum, chrome and general metals....
But a little daub of this on a paper towel lifts the rust marks from your custom metal license plates, black stains from your tailpipe tips, and perfectly restores your Jaguar metal tread plates from ALL the scuffs from your shoes and those dull water spots you get when it's raining and you open your car door.
Vaseline petroleum jelly.
Even the most expensive Jaguar has some hard plastic trim somewhere around the interior. When you get a scuff or abrasion on this plastic, it's doom. Nothing erases it... but a little touch of vaseline does something to the plastic (maybe because they are both petroleum-based materials)---you can't see the abrasion anymore. The effect is also permanent---use it once, and you're finished.
Tri-Nova Marine Protectant.
This stuff is not meant for cars. It's for boats on the water every day, where the salt air, water, and abuse beat on your vinyl and plastic trim every day.
Comes in a black spray-bottle. You have to re-apply after 4 weeks or so.
Wipe this stuff on all your exterior and interior plastic surfaces. It not only protects the original textured surface of the plastic---but it also has this interesting smell that's, well... kind of pleasant to the girls. So especially use it INSIDE the car. Has interesting results on my girl... the rest of you are on your own.