I decided to begin work on removing the rust on a small section of the outfeed table. The surface of the jointer beds are made up of machined “ridges”. I first tried multiple applications of Boeshield Rust-Off. Even though the garage door was open, the fumes were terrible. (I added a fan blowing across the table and that greatly improved things.) I first rubbed off the surface rust with a blue scotch-brite pad. I then sprayed on the Rust-Off, wait 1 minute, then abraded with the scotch-brite for another minute. Finally I would wipe clean with a cotton cloth.
After 6 applications, the surface looked like this…
In the next table section, I wanted to try something without the noxious fumes. I used a razor blade to scrape off all the surface rust. This actually worked better than I would have suspected. I then applied a paste of Bar Keeper’s Friend powder and 3 in 1 oil. I used a 3M purple nylon abrasive pad and rubbed over the surface. I cleaned the residue with a cotton rag soaked in mineral spirits. I used 3 applications of the paste.
The photo shows on the bottom the Rust-Off side, and on the top the powder paste side. The Rust-Off seems to have worked better getting between the ridges, but left an annoying gray oxidation layer. Neither method completely removed the rust shadow stains.
On closer inspection with a raking light source, you can see the severe pitting on the surface left by the rust. I don’t think this pitting will affect the performance of the jointer table, but I must admit to some disappointment knowing that the surface cannot be restored to an “as new” condition without regrinding.
I am still waiting for delivery of some Evapo-Rust to try (could not find a local source). But based on my experiments so far, I am tempted to just use mechanical abrasion to remove the rust. I think a wire brush on a drill would get rid of the rust between the ridges and leave a shinier surface, but I don’t know which type of brush to use. Enco.com has a large selection to choose from (wheel, cup, brass, steel, etc…). If anyone has some advice, I would appreciate it.
-- David W. Cupertino, CA