Ex-wife's new boyfriend wouldn't care for that and neither would I. I just take a brush, bore brush and the gun in the shower with me. Gives me an excuse to play with the gun and to stay under the hot water longer.Your what? Your gun or your wife?
How was I supposed to know there was a special dish detergent for dish washers?
So it does remove some bluing or it doesn't? I can't tell from that thumbnail pic.
I think the dish washer is overkill. There is no need to clean a black powder gun this thoroughly ever. If you use Ballistol or an equivalent all you have to do is swab the barrel, swab out the cylinder, wipe away the excess fouling around the frame, spray or wipe with a rust preventative(Bore Butter, WD 40, REM Oil, unsalted vegetable shortening, etc) and you are done. Everytime you dismantle one you are taking a chance on boogering the screws, loosing parts and loosening fit.
I use the dishwasher for many things other than dishes. Mostly for a thorough rinse. I have my own in the garage (portable one) that I use for rinsing carburators (after a good soaking and quick rinse) amongst other items that need a good cleaning. Wish I could get cyl heads and blocks in it after using the boil out tank.