Well, you will only get out of it what you put in to it. First, we should consider what the rifle is. If it's a Finn 91/30, definitely DO NOT TOUCH IT! as if you parkerize or duracoat a rifle like this, it will lose it's collectability.
If it's a standard 91/30 refurb, then by all means, have at it. You might consider not refinishing an ex-dragoon either. But, after all it is your rifle, and you do to it as you wish. So what is the year and arsenal for the rifle?
As far as procedures, if you're on a budget, the Oxpho blue is good, and Birchwood Casey's cold blue is decent as well. Since you're in an apartment, then that's probably your best bet. You'll want to get some kind of rust and blue remover. BWC sells a kit for this, that's not too expensive. Follow the directions for removal of rust and blue finish. Then you should be at bare metal. Preparation of the metal is what will affect the final result of your bluing. I would use sandpaper, and start at like a 400 or something and move to a 600 then use a buffing wheel to polish the receiver shiny. If you dont' have that option, then you will most likely have a dull bluing result, that will probably be somewhat close to how it looked before. If you don't have a polishing or buffing wheel, you could try some hand polishing with a chrome polish, or Flitz I have heard is absolutely excellent. Might take some hard work, but the better your metal looks, the better your finish will be.
If you use Oxpho or BWC's bluing, preparation of the metal is the most important step before applying. I would buy some odorless mineral spirits (they are less odorous than the odorous kind
but still have a little smell so if you use mineral spirits, do it in a room with a window or outside would be best) to wipe down the metal first. Then use some denatured alcohol or something like that to wipe down AFTER the mineral spirits wipe down. YOU DO NOT WANT ANY OIL OR RESIDUE OF ANYTHING ON THE METAL BEFORE BLUING APPLICATION.
Hot metal will take the blue a little better, so you could pop the rifle in your oven on the lowest setting so it won't be too hot to handle without a bunch of hot pads or something like that. Then use the applicators or cotton swabs (cotton swabs with Oxpho if you don't have any spare applicators) to apply whatever bluing you choose. You'll have to be fast so the bluing doesn't sit on the metal too long without being neutralized. So you might tape off the receiver and do the barrel first. After the first coat, let it sit however long you decide, then take a wet rag and squeeze water over the barrel where you just applied the bluing. This will neutralize the bluing. Lightly dab dry, and reapply if necessary, buffing between coats if you choose. Apply as many coats as you want. When you're done applying, watering drying however many times you want, you'll want to get it all dried off, then apply a nice liberal coat of gun oil to it and let it sit overnight to "cure" Then wipe off and it should be good to go. Shoot me a PM if you have any more questions or anything like that