Brasso and elbow grease.
The bottom rail is the bottom section of the door itself. A kick plate is a metal plate, usually brass that is on the surface of the door.
To clean your brass plate, you get some brass or silver polish and start cleaning. If it is something you just look at, you can put varnish over it after you make it nice and shiny. Ketchup. Best brass or silver cleaner on the market. paint it on with a small brush and allow to sit about 10 minutes and wash it off with clear clean warm water
The kick plate is the plate between the floor and the dashboard in the passenger compartment. The system computer is housed behind the kick plate.
A kick plate is a plate, ~8 in high, on the bottom of a door. It prevents damage kicking, vacuuming, mopping, etc.
Assuming you mean, are the words "clean those brass" adjectives, the answer is no, maybe, and yes Clean is a verb. Those is a demonstrative pronoun. (Some people might call this a form of adjective, as it is a modifier.) Brass is an adjective: a brass trumpet, a brass bookend. Note that brass is also a noun in some uses: the brass on that uniform is shiny, the brass in this orchestra is very good
it is a plate that you kick
It is supposed to be under the steering wheel, behind the kick plate. the kick plate is the small shelf.
You can clean a brass telescope. Over a duration of time, brass starts to oxidize. To remove this, can use vinegar and salt. You can also use a concoction of chemicals that is premade, usually by a company that specializes in brass.
on the passenger side
http://home.howstuffworks.com/how-to-clean-furnishings3.htm
There is an effective way to clean brass door knobs. The first thing they need is to determine if the knob is brass plated or solid. If it is plated, use caution in the cleaner that they use.
Brass will oxidize and turn greenish. Moen and Delta have PVD brass finishes which are more resistant to corrosion.