I have recently come into possession of an old 4-screw K-22. This revolver is without a doubt one of the worst I've seen due to lack of maintenance. The old grease and oil have dried to a hard state. The revolver is mechanically very sound, but the blueing is well worn. I have the side plate off and have sprayed it down good with carb cleaner. I would like to go ahead and take the hammer/trigger assemblies out of the frame in order to do a really good job of scrubbing behind those parts. I have looked on S&W's site and have googled the "how to" do the above. So far I haven't seen the instructions on line. I may have to resort to the purchase of a book for that purpose. I thought before I did that I'd see what the local think tank would recommend I do from nothing to strip it all down type of responses. Thanks.