Question for DMT users

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Forum topic by Marty5965 posted 03-21-2013 06:43 PM 1442 views 0 times favorited 8 replies Add to Favorites Watch
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161 posts in 2558 days

03-21-2013 06:43 PM

Topic tags/keywords: sharpening dmt diamodn stones

Hi Guys,

I scored a couple of hand planes (my first) off Ebay and started fettling them after watching about a thousand videos and reading almost every post on here about it.

When I got to the iron I realized that my 2” Spydercos, which work great on my chisels, were way to small to do a full size plane iron. So I bit the bullet and bought a couple more DMT diamond stones. After it took over an hour to establish the primary bevel on the course DMT I use to true my ceramics I knew I needed more. I now have the full set, extra course to extra, extra fine.

The irons are now razor sharp, but I don’t get the mirror finish that I get from my Spyderco ceramics.

Is this normal, or am I doing something wrong?

-- Marty, Wilmington, OH, learning every day....

8 replies so far

View Kreegan's profile


1452 posts in 2759 days

#1 posted 03-21-2013 07:16 PM

I finish off with a leather strop charged with green chromium oxide honing compound after my DMT stones. That gets my mirror polish. That step isn’t really necessary. If they’re razor sharp, then they’re good to go.

View Don W's profile

Don W

19446 posts in 3180 days

#2 posted 03-21-2013 07:53 PM

Take a look at this,

Edit. One more note, the extra extra fine is the 3 micron. Did you get that one? If not, you probably should, or something equalvant.

-- - Collecting is an investment in the past, and the future.

View Marty5965's profile


161 posts in 2558 days

#3 posted 03-21-2013 08:57 PM

Hi Don, somehow I missed that post, interesting. My top stone says extra, extra fine, which I believe is the equivalent of 8000 grit. I am wondering if I am being too aggressive and pressing too hard.

-- Marty, Wilmington, OH, learning every day....

View BerBer5985's profile


445 posts in 3032 days

#4 posted 03-21-2013 09:01 PM

I use the Paul Sellers method, Coarse, Medium, Fine (240,600, 1200) then leather strop charged with green stuff from Veritas. Mirror finish every time and with approx 30 sec worth of sharpening. Shaves hair like a razor. Check out and see if you can’t find the video on the site.

-- Greg, Owner, Quality Carpet One,

View sikrap's profile


1121 posts in 3971 days

#5 posted 03-21-2013 10:34 PM

Personally, I think we get too caught up with the mirror finish. I can use 2000 grit wet/dry sand paper and get a mirror finish, but its not as sharp as coming off my 13,000 grit stone which leaves a cloudy finish. IME, using water (or any lubricant) tends to leave a cloudy finish.

-- Dave, Colonie, NY

View Marty5965's profile


161 posts in 2558 days

#6 posted 03-22-2013 01:06 AM

@Berber. Yes, I have seen him do that. I suspect my problem was that I was too impatient trying to get the primary bevel on and went too hard with the extra course. When I look at the bevel though a magnifying glass it’s almost as if there are feint scratches under the shiny part. Anyway, it shaves hair off my arm and I expect it to get better each time I hone it. Never had that problem with my ceramics, you can go as hard as you like.

-- Marty, Wilmington, OH, learning every day....

View SamuraiSaw's profile


515 posts in 2577 days

#7 posted 03-22-2013 01:32 AM


I have the same stuff from DMT. I’ve been told they still need to be broken in even though DMT says they are ready. I typically follow up with a 8000 grit waterstone to get the mirror finish.

-- Artisan Woodworks of Texas....

View Mosquito's profile


10030 posts in 2904 days

#8 posted 03-22-2013 01:37 AM

I was seeing the same results as you Marty. I would go through the range of DMTs (I had the same set as you, x-coarse through x-x-fine). I never quite got the mirror polish I wanted, even if the difference was purely in my head. I ended up getting a 6000 grit waterstone to finish with instead of the x-x-fine DMT, and am getting the mirror polish I was hoping for. The edge that comes off the x-x-fine is still very good, mind you, I just wanted mirror polish, I guess.

-- Mos - Twin Cities, MN - -

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