Hmmmm. I didn't know the term "almost indefinitely" means "every few
months"... ; )
In the Pac. NW, if you leave the plywood covering on cast iron during
the winter months, you'll be very sorry. The plywood will absorb a lot
of moisture from the rain-soaked air, leading to rust on the tool
No doubt about it. Elevating your plywood on some sort of non-hygroscopic
material will keep the rust at bay, however. Plastic strips work well.
I keep a plywood cover on my tablesaw because it's in line with the throw
zone of my lathe when I'm roughing bowls. Notice after five minutes of
turning and rub out for ten....
Thought I oughta add what I do DO for the winter months: I saturate a
few sheets of newspaper or packing paper with WD-40 and put that on the
cast iron. If I don't plan on using a tool for an extended time I'll
saturate the paper with cheap motor oil. Works well but the WD-40 is
easier to remove with a quick rubdown of kerosene or spirits while the
oil takes a little more time and materials to clean.
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