Patina removal

[Richard1978]

Hi guys i have removed patinta watermarks from my knives with a rust eraser and cleaning stone but after the patina is removed you can clearly see the scratch marks!...the only way i have found that works is by polishing on a finishing stone but i was hoping i didnt have to get the stones out every time i use the knife and obviously its not effective on removing patina from the era on single bevel knives. Im also worried about removing the patina from a kourochi style knife as i dont want to remove any of the black kourouchi.

Any suggestions appreciated...

Cheers and merry christmas

Richard

 

[McMan]

Rust erasers are pretty aggressive, and best saved for removing rust not patina.
Flitz or simichrome work well to remove patina.
Bar Keeper's Friend is slightly more heavy duty--use cork or a radish. I have no idea if they have BKF in OZ, but there should be some similar mild scrubbing powder.

 

[drsmp]

Sunshine cloth works well with no scratching - add a drop of mineral oil for stubborn areas

 

[M1k3]

Rust erasers are pretty aggressive, and best saved for removing rust not patina.
Flitz or simichrome woek well to remove patina.
Bar Keeper's Friend is slightly more heavy duty--use cork or a radish. I have no idea if they have BKF in NZ, but there should be some similar mild scrubbing powder.

Autosol is another option.

 

[Nemo]

Mothers metal polish (probably most metal polishes would work) will do the trick.

Fine sandpaper (W&D used wet) can be used. I usually use a grit or two above what I reckon the blade finish is.

Rust erasers come in fine, medium and coarse. The fine one work for the finish on some ironclad knives.

 

[MrHiggins]

I'll second the call for fine grit sandpaper, used wet. For some reason, after I use bar keepers friend, my knife will form rust rather than patina.

 

[DaM0w]

Baking soda(don’t be shy), hot water, the soft side of a sponge, and some elbow grease

 

[inferno]

this is the reason stainless steel exist.

 

[M1k3]

this is the reason stainless steel exist.

@labor of love your Wonder Twin

 

[Migraine]

R... remove patina? But it's so beautiful

 

[GBT-Splint]

look no further

https://www.knivesandstones.com.au/products/koyo-polishing-paste-for-stainless-steel-koyo-sha
how to use :

 

[M1k3]

R... remove patina? But it's so beautiful

Since likes are disabled on here, @Angie, +1

 

[spaceconvoy]

LIKE

 

[cotedupy]

Baking soda(don’t be shy), hot water, the soft side of a sponge, and some elbow grease

This would be my recommendation for very gentle patina removal too. A lot of baking soda and a little water or lemon juice, just enough to form a paste that can act as a super-fine abrasive.

 

[mikeeyS]

I use a scotch brite wheel for my bench grinder, works great, get a fine wheel on amazon.

 

[ian]

I use a scotch brite wheel for my bench grinder, works great, get a fine wheel on amazon.

That’s a super aggressive option. I do that for some cheaper knives sharpening clients give me, but it’s more when the knives are super scratched up and need a new quick finish anyway. The OP is talking about removing patina without creating scratches. Of course, the OP hasn’t signed in since Jan, so who cares!