Reply by CaptainKlutz

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Posted on Do magnetic sheets work ?

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1618 posts in 1942 days

#1 posted 11-27-2018 04:31 PM

Yes, magnetic covers work.
Can also use: sheet of cardboard, tempered press board, plywood, or a blanket.
All you want is something covering the flat top to stop condensate forming on top, instead forming on the cover.

If you have large amount of water that runs off top and along edges of magnetic/cardboard sheet, the water will seep under the edge slightly. Once ignored my tools in Missouri garage for 6 months, and had some light rust staining around edges where top was flush with cover edge. Making the cover slightly larger than top, prevented the problem the next winter. Make sure cast iron tops are protected (wax-etc), and the top/cover are dry before covering for any long term storage.

+1 running a small fan to increase air flow helps to prevent overnight condensation. It reduces the temp differential between tools and ambient air which slows/eliminates formation of water droplets on tools.

My biggest condensation events always happened with garage door was opened to warm moist air, and shop tools were cold. Almost instant standing water on every horizontal metal surface in garage.

Best Luck.

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

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