In the USMC marines clean & shine their brass/bronze belt buckels with brasso metal cleaner. You could use that or something similar.
He had a black belt with a gold / brass buckle
probably Marlboro
46.54 dollars
The parts of a belt buckle are the prong, buckle and belt.
Chris McCandless's belt is mentioned in chapter 8 of "Into the Wild" by Jon Krakauer. It is described as a homemade leather belt with a large brass buckle.
The belt usually has a clip or ring that is on the left side (as it's worn) of the belt buckle. Before putting the belt on, put the length of the belt through that clip, then put the belt on. The small nub you'll find on the right side (as it's worn) of the belt buckle will go into a free hole to keep the belt buckle in place. If you have a detachable belt buckle such as a western belt, then the belt and the buckle are sold separately. If that is the case, then the belt will have a snap that will open the end. The buckle has a metal ring on the inside that the end of the belt will go through.
The buckle.
For men, the buckle is on the left.
Before every boy scouts meeting he would burnish the brass buckle on his belt until it gleamed like solid gold.
In many places, it is illegal to possess brass knuckles, regardless of how they are worn or used. Using them as a belt buckle could still be considered a violation of laws governing weapon possession. It's best to check local laws to be sure.
The belt and the buckle.