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. [...]

Here is a link to a project one of our customers completed using American Formula: http://mausercentral.com/forum/viewtopic.php?f=13&t=48432   Bob  

It is inevitable that you eventually run into some problems when rust bluing. Most can be traced to surface preparation and technique. The remainder fall into improper solution used and boiling/steaming issues.   Surface Preparation I always sand/bead blast or use silicon carbide papers to polish the metal prior to bluing and never have any [...]