Lon - I've not had any flash rusting since I stopped using hot water. I use cold water only. After flushing the bore, I lean the barrel against the wall muzzle down to drain, then toothbrush the lock clean in the bucket of water. After the lock is clean, I set it down, pick up the barrel and run patches into it until dry, then spray liberally with WD40, then patch that up and down a few times, then wipe the outside with that oiled patch. I then pickup the lock, wipe it with a dry rag of towel, blow in the 'innards' and between cock and plate to push out moisture, re-wipe, then spray hard with WD40, and set it down. If inside, I spray it over the garbage can as the WW40 flows off the lock in a stream pushing the moisture with it - I use a lot of it and have never had any rust at any time during cleaning or afterwards.
I have seen guys lightly dribble some 'oil' on a patch after cleaning and drying their guns at Hefley Creek Rondy - not me - if it isn't flowing freely, it isn't removing the moisture. It's gotta run.