Tuf cloth :(

B

BaliJeff.

Joined
Dec 8, 2004
Messages
122
I thought it was a good time to clean my knives, 1 of them is a brand new Kershaw spec Bump (first production run) I used tuf-cloth for it, I waited some time and like a big f*cking surprise I saw te blade turned from black to gray :mad: :thumbdn: like extreme wear!!!

This tuf-cloth destroyed my blade, is there anything I can do to restore it or just send it back to Kershaw?
 
I've used a Tuff Cloth on my BM710HS with M2 steel. It has a black coating and the Tuff Cloth didn't harm it. May depend on the type of coating. Did you try rinsing your blade off with some hot water and towel dry it?
 
That cloudy look is the tuf-cloth's protective residue. I imagine it looks gray because it's over black coating. Even a satin or mirror polished blade will look smudgy and cloudy after you let tuf-cloth dry on it. You should only have to tuf-cloth the edge of that knife if it's coated. Heck, I don't think you even need to worry about it at all, since it's 154CM.

Just try buffing the tuf-cloth residue off, or just use mild soap and warm water. You could also try a good quality polish like Maas that cleans, polishes and protects.
 
Yeah, I am pretty sure that you can wipe that off easily. The coating itself is actually more a dark gray than black. If you wash the blade with soap it looks pretty gray. If you wipe it down with a bit of oil it becomes black again. Has nothing to do with the durability of the coating. Actually I found the coating to be rather durable. It takes quite a bit to scratch it. A wetstone will do it easily, but most common things don't harm it, I found.

Wipe it down with a bit of mineral oil and see what it does.
 
use a fine oil like rem-oil to remove the milky look. WD40 would work too, nothing is ruined, nor even hurt, i have had that happen myself, diff finishes react differently, some do get real funky looking.
 
I agree with the oil idea.

I wouldn't do the soap cleaning until I tried the oil. I have a "unsatisfactory situation" that I believe occurred due to the combination. (Annoyed.)
 
BaliJeff. said:
This tuf-cloth destroyed my blade, is there anything I can do to restore it or just send it back to Kershaw?
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There is no way that Kershaw should be responsible for this.
 
I didn't say that, Its probably the fault of the company delivering the Tuf-cloth, but I wll try the tips you guys gave me, thanks!
 
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Haha thanks alot, but, I did think about where to put the topic, as it was not really a ''how to clean my knife by fucked up outcome of tuf-cloth'' question, I've put it in General ;)

I've tried to clean it with other oil, Its beginning to get black again but still not satisfied, does it take time to return to normal colour?
 
I think tuffcloth contains some fluorine. I think its just like a milky film on top of the black finish, the small additive sitting in the very fine texture of the DLC.

If you really want to get it out now. I would suggest to take some dish soap an a dish brush and scrub it a bit and oil it afterwards....But quite frankly, why do you even care, now that you know that the coating isn't damaged? It doesn't affect the performance, that's for sure.
 
BaliJeff. said:
I didn't say that, Its probably the fault of the company delivering the Tuf-cloth, but I wll try the tips you guys gave me, thanks!
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Not to put too fine a point on it, but in my opinion the blame falls a bit more in your direction, since Tuf-Cloth is meant to go on metal to prevent rust. I mean, why bother putting Tuf-Cloth on a coated stainless steel blade? That's like putting a plastic cover over your sofa, and then spraying Scotch-Guard on it. :p
 
Stainless steel blades can still rust and rust can get under coating and attack the steel from underneath. This was discussed way back in the late nineties on Knifeforums where people argued that the coating that McClung was using was problematic because rust could form under it and attack the blade where you didn't see it. Cobalt (same name here) dug up a bunch of links on the problems with the coating McClung was using in regards to corrosion.

If Tuf-Glide, does attack specific blade coatings then it is a valid concern since the material is promoted to be used as a protectant on knives. I doubt that this is the case though and would feel as Hob as noted, it is likely just a residue of some kind. I have used it on a bunch of knives and marine tuf cloth in particular can leave a thick coating which effects the finish cosmetically.

-Cliff
 
Cliff Stamp said:
Stainless steel blades can still rust
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What??? Have you made these revolutionary findings available to our Earthly scientists yet?

Cliff Stamp said:
and rust can get under coating and attack the steel from underneath.
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So putting Tuf-Cloth on top of the coating is going to help it prevent rust that's forming under the coating?

Stop! Don't waste your time responding Cliff, I will just concede the point rather than get into a lengthy discussion.
 
Well, actually, Cliff doesn't need to respond.

Callister's "Material Science and Engineering" clearly states that there is no such thing as a "stainless" steel. Any material containing iron will rust. "Stainless steel" is "rust resistant." That was a test question (for extra credit, too - weee).

As coatings generally have pores (small though they may be), rust can form under them as the water will not as readily escape.

You may also note, that coatings are tested (and rated) as to how long it takes before rust forms in a specific enviroment (salt water spray is common, as is a controlled humidity/temperature).
 
I've tried to wash it off with hot water and a different kind of oil, it still looks gray and it even starts to look white, I have decided I don't take any changes and just retur it to Kershaw for warranty service, if I keep trying things like brushing it off I may scrup of the couting and than its really my fault and I can foget about warranty, but thanks for all the help, I really appreciate it!
 
orthogonal1 said:
Well, actually, Cliff doesn't need to respond.

Callister's "Material Science and Engineering" clearly states that there is no such thing as a "stainless" steel. Any material containing iron will rust. "Stainless steel" is "rust resistant." That was a test question
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Amazing!

captain.jpg
 
Actually, it is amazing.

It's right up there with realizing that "air bags" actually are controlled explosive devices. Some people don't realize they are driving around with a small bomb right in front of there face. I suppose "bomb bag" wouldn't sell too well.
 
Whats strange is that my BM690blk (also cm154) isn't effected by this gray ''protective layer''
 
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