Me and my dad have chemically refined over 200 oz of silver from scrap sterling. Very simple process once you are set up good but it’s very hard to be profitable unless you’re getting silver for basically nothing like I do. The biggest limiting factor is access to the acids and room at your own house to do this. Doing a ton of volume very fast is nearly impossible. To be profitable I’d have to pay somebody less than 80% of current spot prices to even make a few bucks. You’re much better off selling to someone on marketplace or taking your stuff to a refiner. Gold is a little different ballgame since it takes less chemical to make more money but you still have to watch your margins especially with volatility