Once in awhile I get feedback on this. I have experienced it myself. Most of my formulas contain copper sulfate. I experimented and discovered there are two major reasons for this. The first is applying too much solution. The second is electrochemical.  If you are applying Rustblue in low humidity there is a strong potential [...]

Here is a simple device you can build to dry and steam ripen your rust blueing project. It s a simple cardboard moving wardrobe with a a flap door cut in the bottom. This allows the introduction of a mild steam source or heater. It will greatly reduce rust times and produce superior work. Simply [...]

Follow this link to another customer testimonial: http://forums.accuratereloading.com/eve/forums/a/tpc/f/9411043/m/9471048012

Was very pleased with your product. This was the first run for me. It is the answer for the resurrection of vintage scatter guns. I used your steam pvc method. Did the prime cycle, carded, processed an other coat. I then did 2 ten minute steam cycles with carding at the end of each one. [...]