How to get rid of these scratches

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greenfinger

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Hi guys,
Would like to have some advice how to get rid of these scratches that I've made while sharpening.
The knives are Sukenari ginsan stainless clad gyuto and sukenari R2 stainless clad sujihiki.
Thanks

How can I insert pictures?
 
Hi! You can use imgur. Upload a picture there and use the "insert image" button under "Go Advanced". Dropbox and Google Drive also work.
 
greenfinger said:
Hi guys,
Would like to have some advice how to get rid of these scratches that I've made while sharpening.
The knives are Sukenari ginsan stainless clad gyuto and sukenari R2 stainless clad sujihiki.
Thanks

How can I insert pictures?
Click to expand...

Short answer is you have to create new scratches of same depth in one direction and then progressively remove those scratches with finer grit until you get to a grit you like. Some say to go one past you desired finish and then go back to the grit you like. I did this and liked the result. You can use sandpaper or stones but sandpaper is the cheapest and easiest way to go. Stay away from machinery. This is best done by hand with a hard sponge backing the sandpaper. 600 is probably a safe grit to start but it depends on the depth of the scratches. I suggest lengthwise scratches vs width. It looks better and does not show scratches from cleaning the knife.
 
here the pictures

open

https://drive.google.com/open?id=0B2i-QIDN4KqyYXJhNHpDT2ZXZlU
https://drive.google.com/open?id=0B2i-QIDN4KqyRS0zUmdIUjdLNjg
https://drive.google.com/open?id=0B2i-QIDN4KqyR0JYX0dNRnZoaGs
https://drive.google.com/open?id=0B2i-QIDN4KqyVzBtUGhHV2lib1E
https://drive.google.com/open?id=0B2i-QIDN4KqybUE1UXA0YzJUNk0
https://drive.google.com/open?id=0B2i-QIDN4KqyeDVKZ0dpN0RsdXM
 
I am trying to find some decent grits of sanding paper to remove scratches and give a mirror polish to some dollar store knives I have laying around, but they only seem to sell them in autobody shops around here.
From what I could research, you can't find much about how to do it on the internet, but others have said what I found too.

Work with sandpaper, start with a 400-600 grit (if the scratches are really deep, maybe lower), scratch in the same direction until the scratches are uniform before moving onto the next.
For a mirror polish I saw a guy finish at 2500grit sandpaper and some metal polish rub. Also read how leather strops with polishing compounds work to polish further.

Share your results if you go on with it!
 
Soft stainless scratch very easily, it's soft stuff. On cheap ones I use brown/mauve ScotchBrite pads. Leaves a uniform medium-coarse finish.
 
I'm in Italy so I don't know if I can find those pads, maybe somenthig similar.
Can I use a sand paper as the others advice me?
Thanks
 
They are sold everywhere in Europe. Sandpaper gives a much better result, so I use these pads only for convenience.
 
Should I start from 600 and then go to 800 or even 1000.
The actual pattern are widthwise, should I go lengthwise?
 
.... and dont forget to use a soft rubber backing... an eraser wld do... for safety reasons and also to conform to geometry of the knife. If there is some mud around( from stones) esp after sharpening..... add it to the sandpaper. Its a good cleanup and wld remove any oxidation .

rgds z
 
Just lay the edge tight against a cutting board. You could use a piece of cardboard box between the board and the knife. Use a wine cork or piece of hard sponge as a backing. Prepare for sore fingers. From the beginning practice creating straight scratches parallel to the edge and continue this to the finish. You don't need to get close to the edge. Last night i started removing the Kuro-Uchi finish on my 210 White #1 Gyuto and I had to quit after an hour. I only used 400 grit. I actually like the half finished look but I had no choice because my fingers were done. After, I checked the edge and it was not touched by sandpaper and did not need to be resharpened.
 
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