I agree with your point about how easy Marlin lever guns field strip. Just like Glocks. In fact, detail stripping a Marlin is quite easy.
With respect to other long guns, my experience for many years with pump action shotguns was to clean the bore, clean the action to the extent I could reach parts with a rag and q-tip, and clean the exterior. I never even tried to field strip one of my shotguns. My bolt action rifles got the same level of care, except I pulled out the bolt. I still own most of these guns, and they're still in great shape.
If we don't let them get filthy, don't put them away wet or store them carelessly (without a wipedown, in humidity, without ventilation), guns will hold up well for decades with simple, common sense care. Easy field stripping makes deep cleaning easy and fun, but its probably not necessary. I suspect Winchester lever gun owners will testify to this.
Last edited by PhotoFeller; 11-15-2012 at 18:08..