OK. Photos of the open-up / disassembly will be taken.

I have a feeling there will be at least a small amount of brownish, sticky, dried lubricant in the action and probably in the cylinder components.

The last vintage firearm I purchased was a commercial 1924 Colt Government Model with almost all of the original bluing still intact. However, after a complete detailed strip it took several hours to thoroughly but carefully clean the accumulation of sticky gunk from nearly every part and out of the nooks and crannies. My guess is that the internals of that pistol hadn't seen the light of day in decades.

I don't expect anything like that with the Pre-Model 29. Still, doing the deep clean before shooting certainly won't hurt anything and I'll probably be too curious to resist.

Will photos like these work?

Tear down of 686 to do an action job and plug the Hillary Hole:





Pre- action polishing on my 1986 629: