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Stripping ... a Knife

Mudinyeri

20g
"Philanthropist"
Most of the "cool kid" carbon steel knives come with some sort of coating these days. I know the coating is there to prevent rust, but I'm perfectly capable of keeping my blades oiled and rust free without powder coating. Moreover, the powder coat tends to create a relatively high friction surface and just ends up wearing off eventually anyway.

With all that, I decided to do a little stripping last night. No brass poles involved. ;)

I started with a bone-stock ESEE 5 (on the left in the pic below) coated with their standard powder coat. Once the scales were removed, I was ready to strip.

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After a bit of research, I initially decided to try gasket remover obtained from my local auto parts store. A couple threads on motorcycle forums suggested that it worked quite well. I bought the 4 oz. Permatex "Power Can".

The Power Can was not so powerful. It softened the powder coat, but not to the point where I could remove it. Then the dispenser broke when I tried to apply a second coat. So, off to the Home Depot for a different chemical stripper. This time, I selected Citristrip (pictured below).

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I applied the Citristrip liberally with a small paint brush making sure to get inside of the scale mounting holes and the lanyard hole in the pommel of the knife.

Coated Knife

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All this talk of stripping had my wife wanting to go out for dinner so I let the Citristrip do its thing for about two hours while we had a nice meal. When we returned home, I gave my knife a test scrape with the little orange tool shown in the picture below.

Side Note: If you're familiar with CountyComm.com, you may also be familiar with this tool. It's called the Norton Universal Cleaning Stick (U.C.S.). It's made of some sort of chemical-resistant polymer, has sharp, flexible edges and is an invaluable little tool to have on your gun/reloading bench. I buy several at a time because the thin edges tend to get bent and torn.

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There were a few areas of powder coat that were a bit more stubborn than others. On those areas, I used the scouring pad side of the scrubbing sponge in the picture above.

After scraping and scrubbing all of the powder coat off of the knife, I decided to try giving it a nice patina with mustard. I'd seen some pictures of carbon steel knives with forced mustard patinas and really liked the look. I covered the knife in spicy, brown mustard and wrapped it in plastic wrap as pictured below. After twenty minutes, I removed the knife to find little to no difference. Apparently, my preferred brand of mustard is much better for sandwiches than it is for creating patinas. Supposedly, yellow mustard works better than brown. It must have a more acidic makeup.

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Here's the finished product.

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Once the stripping and attempt at a patina were finished, I cleaned the knife with a bit of mineral spirits, oiled it up with a light finish of gun oil and touched up the edge so I can shave with it again. :D

All in all, it's a fairly simple project that doesn't take a lot of time if you have the right tools and supplies. I highly recommend the Citristrip as well as the use of the Norton Universal Cleaning Stick.
 
They came out great but I tend to like the coatings; although when they start to wear off it really bugs me.
 
Thanks. I might just try that on an old Buck navy S.E.A.L. knife with a black powder coat that is looking shabby
 
I have some citristrip, and I just bought 6 gunblack camillus knives. I'll have to offer one up to the mudinyeri strippers....;) I'm also going to try the patina with mustard. I have a huge bottle!

I love mustard...
 
I'm committed. I used some unknown stripping product that I found in the garage ( left by previous occupants ). black coating came right off.

I found a summary of the process online. it recommended 3 passes.

I sanded with 400 wet/dry, straight, then in circular pattern.
covered both sides in dots that connected.
here's what I came up with on the first pass

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the summary said to concentrate 2nd and 3rd passes where color is weaker. I just did a solid coat for the 2nd pass that's "cooking" now. after that I may have to get selective where I put the mustard to fill the gaps
 
that might start to look like fish scales if you have the time......
 
Lookin good.....how much of a PITA is it?
 
dot... dot... dot... dot... dot...

at one point the spine looked like a sort of gray copperhead pattern. if I had pics to go by first, I might have tried that. the darkest stain emerges at the edges, or where the coating is thinest.
 
just in case anyone is interested in this...

I realize that the active ingredient for this task is vinegar. i'm sure the other stuff adds to the coloring though. I learned about vinegar when I searched for how to sharpen files. works like a champ. anyway, after failing in an attempt to spread an even but thin coat of mustard on the blade, I realized I could thin it with more vinegar. then, the tinkerer took over and realized that if I reduced the volume of the 5% acidity vinegar to about a quarter that I would get something around 20% acidity. (not sure of that math, but its in the ballpark). so now I have a rather high acidity coat of mustard wash on the area of the blade that my last batch of dots isn't already covering. I checked a few hours later and it already looked quite dark. can't wait to see what it looks like in the morning after I get it all cleaned off.

when I was looking up more info on this whole process, I saw some pictures that looked like they had just allowed drops of vinegar to just evaporate. It left overlapping circles that were slightly dark in the middle, but dark at the edges. I wanted to get that sort of effect, but I don't think this one is quite going to get there. but hey, a fresh start is only a good sanding away.
 
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