You can purchase it on Amazon as well as theconsumerlink.com
As the bottom of Revere Ware pans are either copper or stainless steel Brasso is not indicated, but may work, I have never tried it. But I have been cleaning my Revere Ware pans for 30 years and below is the method I use to keep them bright. For the pans with copper bottoms you can purchase copper cleaner, I use Kleen King brand. If you prefer you can just dampen the copper sprinkle plain table salt on it, squeeze lemon juice on it and then scrub it, I frequently use this method when I am out of copper cleaner, it is the way my mother always cleaned the bottoms of her Revere Ware and they were always shiny bright. For the pans with stainless steel bottoms you can purchase stainless steel cleaner, once again I use Kleen King, which can be used on any stubborn spots on the exterior or interior of the stainless pots as well.
Copper is good conductor of heat as compare to stainless steel. Hence it (Copper) can heat early as compare to stainless steel. Thats why, use of utensils having copper bottoms requires less time for cooking.
With a good quality brass /copper cleaner like Never Dull
Most any commercial copper cleaner will do a good job. HOWEVER, be sure that you buy a cleaner that is designed for food service use. FriPilot
Paul Revere was a silversmith who also made copper items. Some of these were pans with copper bottoms because they cook better with the copper. In the last 50 or 60 years a company began called Revere Ware. They have been making high end pots and pans with copper bottoms and now they have gone into other things that relate to cooking and dishes.
Plates for printing handbills and copper was used in pots and pan bottoms. It still is today in the Revere pot and pan line of products. Copper is a good conductor of heat.
salt
I am not sure what you mean by "spirits of salt", but a mixture of vinegar and salt is a very effective copper cleaner.
Yes, Revere Ware generally is. They make different styles and types now, but the 'classic' Revere Ware is Stainless Steel with Copper Clad bottoms.
the green patina of copper is desirable
smelting causes pollution, but you are getting copper
I think I remember my sim getting copper, but I'm not sure.