As I posted a while ago, I rust blued this .303 double. I was so pleased with the results that I tore apart the other three that I've built over the years and rust blued them as well. Here are three photos of the results. I couldn't be happier. This was done with Brownell's own brand of bluing solution.

Photo # 1 shows them top to bottom in the order in which I built them,
Top is a 12 gauge rifle
Second is a .22 Hornet
Third is a .450 #2 Nitro Express
Bottom is the .303 British

This photo is from the opposite side and the order is reversed

Same as above. I hope that these photos give even a slight idea of the beautiful, deep, lustrous blue that I was able to achieve with this product. If you've been thinking about trying it, go ahead. It's not rocket science at all, just follow the directions and keep everything 100% oil and grease free.