Cast Tin!

Step 5 Melt it and Skim it

 I'm short good pictures for this step, because it is hard to photograph. Instead, I give you a blurry shot of Milo, looking cute on our shop's couch. Notice our SUPER HANDY table of decimal inches to metrics to fractionals. Every shop should have two of these. 

What you want is for all of the metal to be fluid, no lumpy bits, so get yourself a tool for messing with the molten metal. I used a bent stainless steel spoon.  With a MIG-Welding glove gloved hand, carefully stir the metal and feel for any chunks. Also, be aware of the crap on top.

Skimming the crap: 
 Your spoon is "cold". It's hot enough to burn you, but it is still cold enough to instantly solidify the liquid metal it contacts. We'll use this to our advantage to grab up some of the blackish-yellowish scum floating on the top by grabbing some of the metal under it as well. Feel free to try and stir all the scum to one spot, then pull the spoon out, let it cool, then fish out the scum. It'll take some practice, so be patient, don't let the metal get too hot, and BE CAREFUL, and don't put your face over the molten metal.