by dejure » 25 Jan 2009 16:08
This is probably old news to many of you, I started using this means about twenty-five years ago, but stopped for a while, because the "pro's said it wasn't the best way and should be done using high tech equipment and such.
You can use glass, but I prefer granite (it's free from most granite places, since they have to pay to haul it off to the dump). The main thing is you want a very flat surface. Next, trot off to an auto paint supply store and pick up some wet-or-dry sand paper in the 1500, 2000, 3000 range. Coarser grades can be gotten anywhere, but stay with wet or dry, or jump to stones (e.g., diamond, carbide, or whatever).
If you glue (e.g., spray glue) the paper to the honing surface, it will be less likely to crease and tear, but you can use water to create adhesion, just go slow and be careful. Depending on the condition of your blade, you can start at whatever grit seems appropriate. That may be 180, 220, 400, again, it's dependent on the condition of the edge. Generally, you can double grits, but always use the next finer grit to remove the tell tale signs of the previous grits. By the time you're done, you can have a mirror finish and it takes far less long than you might imagine.
I have granite polishing heads that fit on my variable speed grinder. You can by these on line or at a local supplier. I've used the 3000 grit head to polish knife blades and they turn out remarkable. You can also pick up some Harbor Freight buffing heads and some stainless steel polish to do the same thing, but by the time you hit 3k grit, you've already got a pretty impressive surface,
There is a guy now claiming fame for the sandpaper system, it's called the "Scary Sharp" system and you can run that name for more tips.
This is probably old news to many of you, I started using this means about twenty-five years ago, but stopped for a while, because the "pro's said it wasn't the best way and should be done using high tech equipment and such.
You can use glass, but I prefer granite (it's free from most granite places, since they have to pay to haul it off to the dump). The main thing is you want a very flat surface. Next, trot off to an auto paint supply store and pick up some wet-or-dry sand paper in the 1500, 2000, 3000 range. Coarser grades can be gotten anywhere, but stay with wet or dry, or jump to stones (e.g., diamond, carbide, or whatever).
If you glue (e.g., spray glue) the paper to the honing surface, it will be less likely to crease and tear, but you can use water to create adhesion, just go slow and be careful. Depending on the condition of your blade, you can start at whatever grit seems appropriate. That may be 180, 220, 400, again, it's dependent on the condition of the edge. Generally, you can double grits, but always use the next finer grit to remove the tell tale signs of the previous grits. By the time you're done, you can have a mirror finish and it takes far less long than you might imagine.
I have granite polishing heads that fit on my variable speed grinder. You can by these on line or at a local supplier. I've used the 3000 grit head to polish knife blades and they turn out remarkable. You can also pick up some Harbor Freight buffing heads and some stainless steel polish to do the same thing, but by the time you hit 3k grit, you've already got a pretty impressive surface,
There is a guy now claiming fame for the sandpaper system, it's called the "Scary Sharp" system and you can run that name for more tips.