Update, it's been almost 10 hours now. Small parts are all out with the exception of the barrel bands which I can't get off the barrel and the barrel, shroud and action. Butt plate is still soaking because of the inside, not the outside. Small parts look great, better than I expected. Barrel shroud is the main reason it's still soaking. Receiver is looking pretty good. I am going to let it run a few more hours and probably shut the operation down, clean it up and oil it. My next phase will be to get a steel rod for inside the barrel so I'll be repeating the process on another day I have some time. I'm very pleased with what I'm seeing, wish I was confident enough to attempt this years ago. I have taken photos periodically and will try to get some posted soon. From what I can tell, water is not getting inside the shroud so that may not be as big a problem as I thought. I would still like to get it off however.
The link to the SwedishMauser is here: https://www.milsurps.com/showthread.php?t=43216&page=1