claiming bch and btg by transferring out of armory and btc back in

[boosblock]

i know this has been covered before but i was hoping for some handholding.  i've finally been able to sync my old armory wallets (thanks Holliday!) after a couple of nervewracking weeks. what i'd like to do now is claim my bch and btg which were held in my armory wallets prefork.  these wallets have never touched the inet and i am looking for the safest way to export the keys into trezor or nano s, claim the alt coins and finally send back my btc into armory.  i realize in order to this they'll have to be online.

if someone could spell this out for me--in laymans terms--with line-by-line instructions, in the safest manner possible, i would appreciate it. 

its literally been years since i've transferred any coins into or out of armory and some handholding would be greatly appreciated.

thank you.

[goatpig]

1) Send your BTC to a new wallet the old fashioned way.

2) Do whatever with the original wallets, which only carry the shitcoins now.

[idoB]

I've written a step by step that covers BCH:

Bitcointalk link with goatpig's valuable feedback:
https://bitcointalk.org/index.php?topic=2371955.msg24384387#msg24384387

Editable Googledoc:
https://docs.google.com/document/d/1tC4Mcisd5b9-yQXhwXEdlk0PY2JD6TjX_Ls1t_p6Ax8/edit