Welcome to the forums MetalGod.
For charms and small items pewter (92% tin alloyed with other metals) would sound like the right metal. My own experience is in resin casting from molds silicon molds I make myself and have recently started messing with casting pewter from them.
There are a few vendors on eBay that sell hundreds of items that they replicate themselves using the spin-casting technique. That is normally an organic rubber mold where molten metal is poured in the center and due to centrifugal force is pushed outward filling multiple cavities that are often replicates of the same object. This can be an expensive proposition. First you can get some metal, some RTV silicon kit and a melter and do some trial runs to see if you like the process. The original can be sculpted from most clays, epoxy, wax etc.
A good bit about molding in general in synthetic RTV can be learned by browsing the video and how to documents on a few sites. Call the vendors and ask questions.
www.smooth-on.com
www.alumilite.com
www.freemansupply.com/
As for metals, I had a bad experience purchacing from third part vendor, so I would suggest buying directly from manufacturers. Especially if working indoors do not use pewters with lead or cadmium. Alloys with a little silver in them are also available from the following vendor. I will be purchasing my first order from them early next month. No matter what metal you cast expect to do some trimming and polishing.
I have read good reviews for:
www.hallmarkmetals.net/index.htm
They sell the silver containing version MPK on eBay in six pound bars.
www.ebay.com Search 200428350147
I have also read good reviews here in the forums about:
www.rotometals.com
Spin casting, single molds, Multiple copies in layered block molds, hundred wax copies from a single lost wax tree, many ways to replicate in metal and other materials. I found buying a $63 out the door Lee IV 10 pound lead melting pot was the easiest entry point. These folks shipped quickly.
www.cabelas.com Search Lee Production Pot
www.leeprecision.com/cgi/catalog/browse.cgi?1264155036.5782=/html/catalog/melters.html
Best of luck. Got to tell you to be honest I kind of cringe at your metalgod as a name for it will be a quite a while before you a very knowledgeable in these subjects and other newcomers will assume you know heaps as time rolls on. So if it was me I would re register as something slightly different. But that's me.
