I have been working on a feather wallet plugin to be able to simply perform xmr<->btc atomic swaps using the inbuilt feather GUI. It is very straightforward to use but I would still recommend reading this quick blog post on how atomic swaps work if you don’t know so you understand what is going on behind the scenes.
This is also only the second release so there may still be some minor bugs in it, if you find any please post an issue on the github.
BCH is a better option IMO, they have CashFusion which is a very advanced coin-join which gives you almost Monero level privacy. https://bchfaq.com/knowledge-base/what-is-cashfusion/
MW on LTC requires the other party to also participate, something which exchanges and most people will never do. I used to use LTC but have found BCH to be a better option with more potential in the future as the community is very active.
You can just create two different accounts, both with MW on LTC and pass coins between them to break the chain. But yes you’re right, I wish it was opt-out instead of opt-in
MW smells too much like ZEC. Opt-out should be the default. If you’re here, you probably know this, but what can we do? It’s baked into that shit.
So on the other end you will get fresh coins with no history? How does it actually work?
I do not know the specifics of how MimbleWimble works, but like XMR, transaction history and metadata is no longer public. Your trace of coins are effectively evaporated when you move coins over MW to another wallet from your “compromised” wallet, and from there you convert to XMR/move to another LTC wallet and pay merchants who accept LTC without MW. Obviously, basic OPSEC is expected but other than that the technology is supposed to work fairly well.
You could also do a swap like LTC->XMR->LTC and spend it that way, losing some money in the process but soothing paranoia in return
If that is how it works then the best way to use it would be to keep a pool of LTC that went through MW then spend from it. You do not want to MW a specific amount then immediately move that same amount to somewhere. Because the receiving party could possibly determine the origin before the MW pass-through just based on the amount.