hi there ^^
im a 16 year old teenager who loves collecting edc knives and such, from spyderco to even those weird questionable s&w knives.
ive had my delica 4 ffg for about a year and a half, i got it from my mom for christas (thanks mom!) recently i discovered some sort of mark, or stain on the top of the blade when in folding position, like where the top part will go back into the backlock. it dosent look like rust or corrosion. ive tryed washing it and cleaning in warm water with soap and thoroughly drying it after words but it still stays there.
does anyone have an idea what this might be and how to fix it? thanks 
and i dont really understand how to upload a picture. please dont flame me.
ill try to describe it. it looks like this narrow streak with a darker outline around the streak. And inside the streak it looks mirror like.
im a 16 year old teenager who loves collecting edc knives and such, from spyderco to even those weird questionable s&w knives.
ive had my delica 4 ffg for about a year and a half, i got it from my mom for christas (thanks mom!) recently i discovered some sort of mark, or stain on the top of the blade when in folding position, like where the top part will go back into the backlock. it dosent look like rust or corrosion. ive tryed washing it and cleaning in warm water with soap and thoroughly drying it after words but it still stays there.


and i dont really understand how to upload a picture. please dont flame me.
ill try to describe it. it looks like this narrow streak with a darker outline around the streak. And inside the streak it looks mirror like.