Spiritof77

Hey guys, I'm trying to remove the rust from my grandpa's old 1941 Marlin 81.   I thoroughly removed surface rust from most of it with oil and copper wool, but can't seem to get the rust out of some of the pitting, so I've decided to set up an electrolysis tank i the next few days. I figure I should have gone with electrolysis to begin with, but that's neither here nor there. My question is, can I keep all the metal parts together and remove the rust from all of them in one fell swoop by using this method? Or would I have to take every part off the barrel and do it individually?   My first instinct would be, obviously, that if kept together that the current would run efficiently through the whole piece of metal, but seeing as this takes awhile and it's my first time, figured I'd ask.   A secondary question would be, how long should I leave that sucker in there? I get conflicting reports ranging from 12 hours to multiple days. The rust at this point is just in nooks and crannies, and the rear sight is seized up from internal rust on the screw. Should I try to unseize this, first?   First post and all, so let me say thanks in advance, and I love this forum already!