I'd start by disassembling the rifle.
All the visible parts would get a nice glass bead blasting. Cut the end of the gloves off the blaster; gets in the way of holding small parts. The tips of your fingers will get tougher.
After the bead blasting I'd apply some 500 grit compound to your floor-mounted 2 Hp buffer, be careful not to dish out any stamping or round off any square edges.
Next apply some 1,200 grit rouge to another wheel; let the buffing wheel spin at full speed, then lean into the wheel with the stick of rouge and let your body weight stop the wheel just as it liquifies then hit the power off switch then repeat.
Let the wheel cool and polish to a high shine.
Drop all the parts into a hot soap tank. Use tiny brushes to ensure you buffing compound is completely gone.
Hit the hot water rinse tank, rinse very well.
Take the pieces rite from the rinse tank and put them in your bluing rack somehow. Wire coat hangers work well.
Set them in the already boiling, preferably Brownells, bluing sauce. Keep an eye on the sauce and keep the parts below the surface.
You'll want to maintain the desired temp, the trick of the trade is to adjust temp by adding more water, don't screw with the flame ever!!
When the parts look nice and black, remove from the sauce, rinse well, and drown them with WD-40 or similar.
Wipe excess oil off and re-assemble the gun.
That is how I've done it for years!!
Will