I don't agree in this case. The Stoeger guns are just not properly finished and it needs more than just being used. If you look at the mating parts where the barrels meet frame and the forend you'll see what I mean. Rough as a cob.
What I did to mine was liberally coat the mating areas with JB Bore Paste. Then open and close the action a bunch of times. Clean it all off really well with a spray product like BC Gun Scrubber or even brake cleaner and lube it and see if you got it done. If not do it again. Don't use anything more aggressive than JB tho or you might take off too much metal. JB only polishes.