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In the spirit of Al's post, I rub the saw blade across a cake of soap before cutting, and periodically pul out blade, clean of grit, re-soap and keep cutting. The soap is a little less messy than WD40 or other oil lube.
I do the same to files with soap when filing aluminium. File teeth are much easier to clean with a wire brush and the quality of the file cutting is restored.
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