Hi Timely!
Thanks for your kind words. I feel like I'm still working the kinks out of my process, as I've still cleaned up under 100 estate pipes in my lifetime. So I hope you'll take that for granted with the information I provide below. I should also say that all the info I've gleaned on cleaning up estate pipes has come from the threads on this site, on the Reborn Pipes Blog that so generously shares the "hows" and "whys" of cleaning up pipes, and from chatting with other restoration hobbyists here like ejames, captainsousie, samcoffeeman, shaintiques, al, durham, tbradsim1 and the countless others that chime in with thoughts and ideas. This is one helluva grant place to haunt to learn.
But I'm babbling... so to your question.
Pat's Everchanging Process for Pipe De-Gunkifying and Prettiment
1) Ream back cake - I am currently using a Castleford Reamer set. In most cases I leave a small amount of cake (less than a dime), if it's uneven, I'll hand sand to bare wood using #400 wrapped around a piece of dowel.
2) Clean bowl rim - I use a cotton tea-towel and saliva and rub off the carbon build-up and smoke/oil/gunk residue changing to a new piece of cloth (and fresh 'solvent') when the towel discolours. This can strip stain, so I'm careful to do this under bright lights, and if I see the colour lightening at the edges of the rim I stop.
3) Clean bowl & shank exterior - Often I don't do much more here than wipe down with a slightly damp cloth (especially for smooth pipes), for rusticated pipes or deep craggy blasts I use an old toothbrush and Murphy's oil soap. For really cruddy pipes, or pipes which I am going to re-stain, I'll soak them in rubbing alcohol to clean grime and leach stain.
4) Stem soak in oxyclean - I soak my stems in oxyclean. I know that this is a matter of some debate. In my experience it lifts the oxidation and makes it easier to get rid of through sanding/cleaning, and it also aids in cleaning the airway through the stem.
5) Salt & alcohol treatment - I do my S&A on the bowls at this point. I typically do this at least once, often twice, for each bowl/shank.
6) Clean mortise/shank interior - Once S&A is done, I use rubbing alcohol, shank brushes, bristle cleaners, q tips and pipe cleaners to finish cleaning the interior of the shank. I finish this step by burning off the residual alcohol in the bowl and shank.
7) Clean stem airway & button - Using a shank brush (don't tell Harris, I bought them all) I clean the interior of each stem as soon as it comes out of the oxy bath. Then I rinse the stem until all the oxyclean has been removed.
8 Stem exterior - I start with 0000 steel wool, then move to magic eraser, to take down the lion's share of the oxidation. Once the magic eraser isn't pulling more oxidation, I move to micromesh and sand from 1500 - 12000 grit pads.
9) Buffing Rouge/Tripoli, White Diamond and Carnauba - I rarely use tripoli, I find that it's pretty abrasive and so only use it to smooth out dings/dents/scratches on smooth finished pipes, or to finish the tops of rims where I couldn't pull all the char with saliva and a cloth. I use white diamond and carnauba to finish the clean up on pipes/stems I restore. I also use a heat gun to aid the melt of wax onto rusticated and blasted pipes.
10) Hand polishing - All my pipes get a finished buff/polish by hand after coming off the wheel.
I should note that I use 99% isopropyl alcohol for every process above in which I state that I use 'alcohol'.
I am sure that I forgot something. But, for all intents and purposes, that's how I clean 'em up.
Hope that helps,
Pat