INTRODUCTION TO METALWORKING 

INSTRUCTOR
http://nikkiromanello.com/welding.html
http://nikkiromanello.com/foundry.html
http://nikkiromanello.com/tig-welding.html

METAL MATERIALS
Rapid Steel (Large Orders, Local Order and Delivery) (718) 392-9500
McMaster-Carr (Small Orders, Tools, Hardware, Order Online, Ships out of NJ)  https://www.mcmaster.com/

WELDING MACHINES, SUPPLIES, TOOLS (Online)
Cheap: https://store.cyberweld.com/
Cheap: https://weldfabulous.com/
Best For MIG Welding: https://www.millerwelds.com/
Best For TIG Welding: https://www.lincolnelectric.com/en-us/Pages/default.aspx?locale=1033
Tools: https://www.harborfreight.com/
Tools: https://www.grainger.com/

WELDING MACHINES AND GAS SUPPLY (Local)
http://www.twsmithcorp.com/ (They also rent out machines)
https://www.airgas.com/
http://www.libertygases.com/
https://www.gtrentals.com/ (They rent out machines and tools)

SMALL METALS AND JEWELRY
http://www.metalliferous.com/ (Local)
https://www.riogrande.com/ (Online)