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Sharpening Tips
Sharpening with a stationary disc or belt sander.
When using a disc or belt sander to sharpen tools, remember to remove the imbedded sawdust from your belt or disc with an abrasive cleaning stick or similar device before sharpening to prevent the heat build-up from setting the sawdust on fire.
Make-it-yourself Round Slipstone.
A piece of 600-grit silicon carbide, wet-dry sandpaper wrapped (or glued) around an ordinary wooden dowel makes an excellent slipstone for sharpening curved-edge tools.
Getting a grip on flat plane irons during sharpening.
Flattening the backsides of plane irons or jointer/planer blades can be difficult since they're seldom thick enough for you to get a good grip on them during sharpening. Try using a discarded speaker magnet (or "Rare Earth" magnet from an old computer hard drive). Either should give you enough of a grip to move the blade back and forth while flattening their backsides.
A flat, fast-cutting sharpening surface
Few surfaces are flatter than a sheet of glass. Cut two pieces of thick, 1/4" glass to about 9" x 12". Use spray adhesive to attach a sheet of 150-grit aluminum oxide or silicon carbide sandpaper to one piece and a sheet of 320 grit to the other.

Using a wheeled honing guide, set to the proper angle, start with the 150-grit sheet and spray a fine mist of water onto the sandpaper for lubrication. Roll your edged tool back and forth to "grind" the edge to the proper angle very quickly...without fear of overheating or ruining the temper of the edge.

Cleaning sharpening oil stones.
Believe it or not, the oil stones you use to sharpen your tools can get clogged to the point where they won't work properly. To solve this problem, soak them in a container of kerosene ... or rub their surfaces firmly with your fingers.
WD-40 makes a great oilstone cleaner
Just spray it onto the stone's surface to wash away particles and metal shavings -- then use it as a lubricant instead of ordinary honing oil, if you like.
When a wire wheel loses its cutting abilities
After a lot of use, a wire wheel can get dull and ineffective. The first and most obvious approach to getting more work out of it is to reverse it's direction of rotation. Usually, this will extend its life for a while. However, it will eventually become dull while running in this direction, as well. When this happens, reverse its rotation once again and run it against a coarse grit sharpening stone or grindstone to create sharp, new tips on the bristles.
Flattening Waterstones
Sharpening stones that are not flat are also not particularly useful. Waterstones, in particular must be flat to work properly. There are several ways to ensure this flatness. Here are two:

1: Rub the faces of two waterstones (of the same approximate grit) against one another each time you use one of them. When they're flat, you'll be able to "feel" the increased resistance.

2: Lay a piece of Silicon Carbide, wet/dry sandpaper (fine grit) on top of a piece of glass or laminate (countertop or similar) surface. Glass is ALWAYS flat and countertop surfaces are perfectly flat in most cases. Flatten your stone's surface by running it back and forth across this sandpaper.

Protect the temper of tools you're sharpening
If you're planning to grind your edged tools using a belt sander, strip sander, disc sander or abrasive wheel, chill them first in a can of ice water to help protect the temper of the edge.
Inexpensive cabinet scraper edge burnisher
To achieve a correct, "hooked" edge on a cabinet scraper, it should be burnished prior to use. Most burnishers that are designed for this job are fairly expensive. However, ordinary kitchen knife sharpening steels will do just as good a job and can usually be bought "for a song" at flea markets and garage sales.

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