I really have considered hot rust blueing, but I don't know if I want to invest in all the equipment, I really do like the blue finish on my Colt's and S & W's from the 80's and prior. Outsourced is very expensive, I already have a lot invested. I already have a sandblast cabinet, compressor, touch up spray gun and air brush, everything needed to apply cerakote.I'd be real tempted to polish it to as close to a mirror finish as you can then get it blued, polished and blued again. it should give it almost a Colt Royal Blue finish to it.