Looked for threads about bitcoin gold fork but did not find what I was after.
Lets say i have a small amount, 1000 in dollar value at coinbase, the same on my trezor and the same at my blockchaininfo wallet.
Now we have a bitcoingold fork and suposidly I have some amount of coin in that block chain. I dont want them. What is the mechanical process to sell them off? Is the same key structure in place. Are my bitcoin private keys the same.
I'm not sure what you mean by "1000 in dollar value at Coinbase." Last I heard, Coinbase wasn't supporting Bitcoin Gold, so there's nothing you can do with funds held in their wallet or exchange:
https://support.coinbase.com/customer/portal/articles/2892196-bitcoin-gold-faqAs for the TREZOR, what kind of wallet is it -- standard? Are your BTC held in addresses that look like 1.......? If so you, you can use the Coinomi wallet to retrieve the BTG, same as Blockchain.info. In that case: 1) Move your BTC to new addresses under your control. 2) Sweep the empty private keys into the Coinomi BTG wallet.
From there, you can send it to an exchange like Bittrex to sell.