No...the only stuff I've purchased is the Laurel Mountain product from Track of the Wolf. Shipping total on two bottles was $10 US.

I imagine that you're more interested in an express solution, but...

If you have the "ingredients", you might want to give the copper chloride/hydrogen peroxide/sea salt solution a try on some scraps.

Have to watch the volume of copper chloride...too much in the solution will pickle the steel instead of rusting it. Don't rub...did that with a hot part and ended up with a shiny layer of copper.

The Laurel Mountain product warns against that as well....it must have some copper in it too.

Hoping that replacing the copper with iron (as in the Niedner formula) will resolve that issue....we'll see.

Al