[GreenKeys] Cleaning agents

[Keelan Lightfoot]

> Recently, I have become a convert to Evapo-Rust. It is especially good for 
> removing spot rust from plated or blued steel, since it only acts on the 
> iron oxides, it won't affect the plating or paint. On the expensive side, 
> $9 quart, non-dilutible.

Most of my recent de-rusting experience has been with bigger stuff (woodworking machinery); electrolysis for the big stuff, and Evapo-Rust for the little stuff. The one lesson I learned is that blued items are not completely safe in Evapo-Rust. Without thinking, I dropped a blued handle into my jug of Evapo-Rust one night. The next morning I pulled out a nice silver coloured handle. Oops.

The bright side is that I learned how to do ye-olde-fashioned rust bluing with household chemicals, which is a simple and satisfying process with surprising results.

- Keelan