In myprevious post, I describe my results from one coat of "painting on" rust remover. Not the most effective technique.
In this test, I submerged what I'm calling a lathe arbor to see how this works. I used the same "The Must for Rust" made by Krud Kutter that I got from Wal-Mart. This time, I used a solution of one part Krud Kutter to one part water. The label describes diluting with water, which is similar to directions on EvapoRust. Incidentally, this stuff is also supposed to be biodegradable (whatever that standard is) and is supposed to inhibit new rust for months.
Here's what the lathe arbor looked like, pretreatment. Mmm Mmm...
Adding the Krud Kutter to the water at a ratio of +/- 1:1.
Right after pulling the lathe bit out of solution from its 24-hour soak. Man, that stuff smells like rotten eggs!
After hitting it with a steel wire wheel.
After a bit of filing and some white polishing compound (yup, I went to Harbor Freight today).
Despite the marring from Vise Grips or water pump pliers, it turned out pretty well. Moral of the story, soaking in "The Must for Rust" over night in a 1:1 water solution works pretty well and makes the stuff go farther. Plus, it removes rust deposits internally that abrasive wheels wouldn't be able to get at. The next step is to try Evapo-Rust and see how it performs.
I should note that I'm not sure how The Must for Rust works. I know Evapo-Rust only affects iron, so iron oxide (rust) is removed while leaving the stronger steel alloy. I'm not promoting Krud Kutter! I'm just testing it to see how well it works, but it looks like if you can submerge it, it works well at a 50% dilution. However, it did not remove paint or resin.
