I know that a lot of folks have a phobia about plastic parts. I'm simply not one of them. I LIKE seeing the bright orange end of the follower to indicate that there's no more ammo in the magazine tube. And since it's reliably shot somewhere up around 2000 rounds of ammo without any issues or apparent wear to that plastic part I'm happy to let it keep on fullfilling it's mission and aid me in signifying when the magazine is empty with a quick glance.
If it ever does act up I'll be quick to replace it since I've got a lathe as well...
Rest easy on the idea of things going SPROING'NG'NG! and leaping for freedom. The rifle comes apart with no big fear on that count. The only things to watch are the mainspring which you will pin with a small nail or a bit of iron wire and the ejector spring which won't be under tension but will tend to fall out with the ejector when you slide the bolt out the back end. All other springs are simply not a big issue as they are trapped by a plunger and locking pin.
However the 92 DOES have a lot of small parts if you go deep enough into the strip down to do the slicking up work. So a small compartmented parts box with snap on lid isn't a bad idea. It contains the bits and gives you separators to let you keep associated bits together to aid the later assembly work. I keep a few around and empty just for this sort of work.
If you don't have any stones for the work when you eventually get to it I can recomend the Lansky knife sharpening refills as viable options that will do the job nicely. A flat fine hone and a triangle fine hone pair will do all the work you need on your Rossi. With the flat hone you may need to shave away the plastic on one side so you have a flat 90 to work into corners. The fine hones will crest off the machining marks nicely without removing too much, too fast and leave just the right sort of slick surface for the parts to slide over each other nicely. The triangle stone will come in handy for some of the deburring jobs.
A sheet of 600 wetordry sandpaper finishes off the kit of abrasives you'll need to do your Rossi slicking up work. You'll slit a bit of wood dowel and wrap a strip of this sandpaper around it to polish out the ejector spring path in the bolt to deburr the edges of the parts of the bolt that would otherwise catch on the spring coils.
And needless to say if you don't already have a decent set of gunsmithing screwdrivers this would be an excellent time to invest in one.