Haha oh no, it's not a trade secret.
Often, jewelers sell their scrap precious metals back to the companies or refineries that they bought it from. The refineries pay for scraps (even minuscule filings!) depending on the weight of the total scrap. They can then add the scraps back to the "melting pot," so to speak, and it'll go into other orders. The expectation is then that the money you receive for your scrap would then go toward your next order (it's not required, but it's the unwritten rule/advice).
OR for an extra fee (of course), if you have enough scrap to make a nugget or bar, or I think even wire, you can request that they only reconstitute the scrap for you. You would have to make your order at that time, however.
I'm not sure who exactly you can send your scrap back to, but I'll look it up and ask around and get back to you on that.
Anyway, good luck selling your gold!
(This reminds me: I should sell my scrap silver sometime soon... )