Bead blasted knife rust

C

CSRevenant

Joined
Jun 13, 2010
Messages
72
Hello,

Got a new kershaw speed bump, and its a great knife - except for the bead blasted finish. Ive had it around a week and its showing small rust spots. I apply rem oil every day, and I cant prevent rusting.

Are there any greases or anything that works better and last longer than rem oil? What are my options for refinishing it?


Thanks
 
It wouldn't be too hard to polish if you have the right supplies. What are you doing with it that is causing all the rust? I got a Kershaw Mini-Cyclone about a week ago and have EDC'd it since then for work and other things, and so far it is still in great shape without any oiling.
 
I have used wax to reduce rust. Once you work it into the pours of the finish it should help.
 
Little light rubbing with mothers works to remove the little rust spots without messing up the finish, then I use a tuff cloth.
I don't have any problem with rust after using the tuff cloth.

My New zing tanto formed rust spots the second day I had it, I pulled it from the package and set it on top of my knife box.
We have high humidity in MO, 70%+ all the time
 
Rem oil is very thin. I'd hardly even call it an "oil". Try anything you have that's thicker/heavier, gun oil, motor oil, etc until you can get something better. I like ballistol in the spray can goes on thin, penetrates all the nooks and crannies, then the solvent dries off and leaves a coating like a very thin layer of vaseline. Very good against rust. Stinks like a$$ when you spray it though, take it outside or :barf: .
Lots of folks here recommend mineral oil or vaseline especially if you want to ever use your knife for cutting food.
 
I really havent used it much. It sits in my pocket and rusts. I live in western washington though, so its very humid.

Im hesitant to use any kind of paint, as it could mess up the stud lock.
 
Go get some simichrome from your local hardware/big box store and polish the blade with a clean dry rag. It won't change the look of the blade but it will smooth it just enough to stop rust. I live in western WA also and had a some problems with a brand new bead blasted blade until I lightly polished it. When I say polish I mean just rub it in a circular motion for about 5 min. It should look exactly the same as when you started. Then when your done wash it with HOT water and soap and then apply some gun oil, tuff cloth, rem oil, Bore butter (my personal favorite for preventing rust).
 
I love Kershaw but their beadblast will lead to rust spots , I've seen numerous threads about this.

Your best bet is to get some VF steel wool and flitz , wenol , etc and polish off the beadblast , your rust problems will end right there. I've done this to near every Kershaw I own and it works.


Tostig
 
Why do people have so much trouble with bead blasted finishes? I used my ti/sg2 beadblasted Junkyard dog 2 all weekend at VA beach for fishing, no oil, and guess what, NO RUST. All I did was soak in a hot water bath for 10 seconds, and once dry, oil the pivot. I also have a sandblasted BM Griptillian, and no rust issues.
 
I live in Western Washington too, but I don't know why yours is rusting. My Mini-Cyclone is in my pocket everyday at work where I sweat a lot, but so far the only noticeable problem is that concrete dust has gotten in the pivot. No rust at all. They are the same steel and finish, aren't they?
 
To be honest I've never had any of my Kershaws rust , but like I said I always polish off the beadblast finish , more for aesthetics than corrosion proofing.


Bear in mind that beadblasting is often an inexpensive and effective method of finishing parts without having to fully get rid of grind marks etc. so when you get rid of the beadblast you may find imperfections underneath.

Tostig
 
Maybe im one of those people with acidic skin oils. The rust spots are very small, but noticeable if you are looking for them. I started wiping it down often with a hoppes silicone cloth. Hopefully that will stall it while I find a better solution.
 
CSRevenant said:
Maybe im one of those people with acidic skin oils. The rust spots are very small, but noticeable if you are looking for them. I started wiping it down often with a hoppes silicone cloth. Hopefully that will stall it while I find a better solution.
Click to expand...

In the short term, the existing rust spots on the blade might be removed with some Bar Keeper's Friend cleanser & water. If you've never used it before, it's similar to Comet or Ajax, but uses oxalic acid to chemically remove the oxide (rust). Take a small glass dish, sprinkle some of the Bar Keeper's into it, and add a little bit of water to make a paste. Use a Q-tip or paper towel to 'dab' a little bit onto the rust spots & rub a little bit. The rust will disappear almost immediately. Wipe away the residual cleaner, rinse thoroughly in running water. Wipe down & dry. After that, you might do well to polish the blade a bit, as others here have mentioned. Polishing does help to reduce the possibility of future rust problems.

The Bar Keeper's Friend is great for cleaning ceramic stones, too. Just be sure to read the cautionary instructions on the container, as the oxalic acid is capable of damaging some materials.

http://www.barkeepersfriend.com/cleaning.html
 
Had the same thing happen to mine, within like a couple of months of buying it.
From what I understand blead blasting increases the surface area on the blade and allows it to rust easier(I think that's what I read).
And it's not just Kershaw bead blasted knives that rust affects. I have a Cold Steel AK-47, same thing happened, and that blade is made of a different steel than the Speed Bump,
It's AUS-8. But, again bead blasted.
I've read the same thing about the Spartan model too. Whereas I have a SOG Flash II, that never rusts, and it's AUS-8, but not bead blasted.

Anyway, blah,blah,blah. My remedy, Brasso metal polish, and a rag and the rust came right off. Have used 3 in 1 oil to coat the blade and it seemed to work ok.
Recently switched over to Mineral Oil and that seems to work to.
 
are you sure its rust and not mineral deposits from sweat and moisture. if it is i use metal glo to clean and musuem wax to protect my high carbon blades. these products are non abrasive, so they wont leave any swirls or scratches and ruin the finish.
 
Well, I tried some mothers polish, and some barkeepers friend, and as I was cleaning it off, I rinsed it an dried it off completely, and ten minutes later there was a very large rust spot. So I just used 320 grit sandpaper to scrub it away. It looks like trash now, but I suppose it wont rust much anymore.

That will be the last bead blasted knife I ever buy.
 
I sweat a lot and have had rust spots in the past, but that stopped when I started using Sentry Solutions Marine Tuff Cloth. Problem solved.
 
CSRevenant said:
Well, I tried some mothers polish, and some barkeepers friend, and as I was cleaning it off, I rinsed it an dried it off completely, and ten minutes later there was a very large rust spot. So I just used 320 grit sandpaper to scrub it away. It looks like trash now, but I suppose it wont rust much anymore.

That will be the last bead blasted knife I ever buy.
Click to expand...

You could try a higher grit sandpaper, to get a more polished look(600, 1200, etc). Basically the higher you go, the more polished it should look. I am guessing here, because I'm in the middle of polishing up a Kershaw Storm II that had some really bad rust spots. I just need to get some higher grit paper on it. That is kinda crazy about the rust showing up that fast. It must be really humid where you are.
 
I wouldn't limit yourself and say you'll never buy another bead-blasted knife, there are some great knives, and despite them being more prone to rust, I think there must be something wrong in your situation because mine is holding up wonderfully and it has been drenched with rain, sweat, concrete, and has seen heavy use in the past two weeks. In any case I'm sorry to hear that yours hasn't worked out well. Time to try polishing it! :D
 
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