With years of caked and baked on stuff I'd try to reduce my work. Since I'm lazy and don't want to run so many patches I'd start with a couple 24 hour periods with the wipeout with accelerator. It's amazing what crap that can remove without you having to do anything but wait. Anything that remains after that I'd go after with CLR. It works very well.
I again second this and my experience supports this statement 100%
As I said have been using Wipe-Out foaming bore cleaner made by Sharp Shoot R for at least 10 years now after I read a review of it over at BR central. I gave it a try because I really didn't like using cleaners like CR-10 as they stunk up the entire basement when used them and I was using tons of patches to clean my long guns.
This is not my recommendation or me instructing anyone on how to use Wipe Out just only my sharing my experience in using it. and how I USE it.
With my rifle leveled and securely in my gun vice
First I take a copper solvent proof nylon bore brush and wrap it with a patch I put a little W/O Accelerator on it to help it stick to the nylon bristles.
Next I insert it into my bore guide until it is centered in the removable solvent port and absolutely saturate it with Wipe-Out Accelerator and add a little in the tube of the bore guide in front of the brush
Then I work it back and forth the entire length of the barrel 10-15x till it creates a kind of froth.
Next I take two correct for caliber nylon bore brushes the type that will not react to copper solvents wrap each in a caliber correct patch place one on my bench by the muzzle end other by the breach end
Then I remove the plastic part of my bore guide with the solvent port and using the extended applicator sold by Sharp Shoot R inject the Wipe-Out foam into the barrel until it barely starts to come out the muzzle end
Then quickly as I can plug both ends with the patch wrapped brushes.
Allow to soak 4-12 hours
Using a 100% nickel plated Tipton bore jag push 8-12 cleaning patches through bore.
Cleanse barrel first with my DIY Big Ed's Red then with action cleaner
Lightly Lube with Brake Free CLP
In the last ten years I have performed this exact process certainly well over 100 times in my Bolt, lever and semi-auto rifles, inline muzzleloaders and fully rifled barrels of my 12ga slug guns with no ill effects what so ever.
Although Wipe-out is advertised as safe for any modern gun stock finish, regardless I always do exercise great care not to get ANY type of cleaning solvent on my beautiful wood stocked Marlin 336c's or Encore 209x50 ML.
I have let Wipe-Out and Accelerator soak in my plugged barrels anywhere from 1 hour to 4 hours to 12 hours and have had no issues or any type of damage done to my barrels both stainless steel and chrome molly and never had any instant where it caused rust to occur in my chrome molly barrels.
What utterly amazed me is how few patches I have to use to go from filthy to clean very rarely do I use more then 10-12 patches most ever I can recall was 15 before they came out same as they went in. This is cleaning rifles that had been fired 30-60 times between cleanings.
