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Preventing Tool Rust

Tips & Techniques
An accidental discovery by one reader leads to rust prevention on tool beds and tables.

When I turn on the heat in my uninsulated shop, you can almost watch the rust form on the machined surfaces of my tablesaw, jointer, etc. I tried commercial rust preventers, but they didn't last long or transferred to my project materials.

Purely by accident, I found that spar varnish, sprayed on my machine tabletops, effectively prevents rust. After a light sanding with 400-grit paper, the surfaces are shiny and smooth, with no transfer to my workpieces. It's been more than 6 months since the treatment, and I've not seen a speck of rust.

- John Gaeler, Keswick, Ont.

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