Well I have not used real black powder for a very long time but when I was a kid my dad always used to make me clean his after shooting with just plain old soap and hot water in the kitchen sink. After everything was cleaned up a light coat of oil was applied and we never had a problem. I had a chance to use and hunt with some tripple7 powder about 7 years ago in a muzzleloader and that stuff was great for cleaning. Again just a patch soaked with water and the gun would be clean after a few patches and never had any rust issues at all.
I have always just cleaned my black powder firearms in hot water and Pinesol. Both cap and ball revolvers, inlines, and traditional muzzle loaders. With the traditional I wipe it down with Thompson Center Bore Butter but for the others I just apply a little bit of oil and have never had a problem. Now when I say hot water I mean boiling hot water. It will get the metal so hot that you have a hard time holding onto it and once the metal is that hot any water that touches it will evaporate quite quickly.
When calling coyotes, more often than not they will circle on a target they are
coming into and approach from the downwind side. Presumably they do this in
order to align what they smell, with what they are hearing.
This means that you should always have your downwind side camouflaged and have
an open shooting lane. If the area is heavily covered the coyote could come in
take a look and be gone, with you none the wiser.