Cleaning Ruger Old Army

[ANDY T]

I am very new to this. I've recently bought a secondhand ROA (blued) and need some advice on cleaning it. I use Pyrodex P.

So far I've been removing plunger (is that what it's called?) and cylinder and soaking them in hot soapy water and cleaning with bronze brush and cotton mop. I do the same with the barrel, but haven't done anything with the lockwork.

Is this OK?

I am worried about putting the whole thing into soak, but I am also worried that gunk might be building up in the lockwork.

Been oiling with olive oil - is this OK?

Do I need to grease anything - if so where and what should I use?

Also I remove the nipples and give them a good clean, but been told that I shouldn't take them off as it causes wear - any views?

Thanks