Quote:
Originally Posted by Doug Lester
You could try pickling the blade in white vinegar overnight to eat the scale and then scrub with a wire brush before returning to sanding.
Doug
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This! Lot cheaper than belts and a lot easier. Just use a glass container, put a spot lamp next to it to heat it up, and oh yes....set the container in a plastic or glass pan (sometimes the process will foam up and overflow a little. Just check it after a couple to 4 hrs, but just let it work and it will soften that scale right up.
Note: Don't plunk the blade into the container, set in gently or you'll knock the bottom out of the jar (don't ask how I know this). I have a disc of rubber matting in the bottom of my jar just encase one slips. Also, if you have longer blades, those tall spaghetti jars work really well and have a screw on cap for when you are not using.
?? - you didn't mention a hardening quench after reaching critical temp, before tempering. Hope that's just a typo.