I have an amazing carbon steel knife that is badly tarnished & a shows minor rust. Will this product help with tarnishing? Or just rust?

I use it to clean my sharpening stones. Metal is left on the stone in the form of a black liquid. To clean your knife I would use WD40 and xxx steel wool. Carbon knives get a patina over time which is normal. This actually protects the blade to some extent. Red rust is bad and should be removed by the method I mentioned above. For just the patina or tarnish you mention you can clean the surface with a green scotch bright pad which is finer then the other colors. 1x Rust eraser is not very course and should not damage your knife. Use light strokes and keep the pad wet.

I just got 2 used ceramic whetstones at a thrift store that have little wear but both have rust on one side of them. will rust remover work on stones?

These rust erasers are actually made to remove surface rust from knives. They will work to clean the surface of soft waterstones, and the higher the grit, the better they work. They're almost useless on really hard ceramics (Spyderco stones), or on really coarse stones. I own one and regularly use it to clean steel particulate from Shapton Glass, Naniwa Super Stones, and a few others.

Can i use this on my diamond stones

Yes you can, but its gonna wear your eraser out quickly. Soap and water and maybe a scrub brush is a better idea.

when should this item be replaced? how long will it probably last?

It all depends on how much you use it. I removed a moderate amount of rust from two Japanese carbon steel blades and it is hard to tell whether I used 1% or 2% of this eraser.

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✨ Unleash the shine in your knives! ✨

QUICK SOAKING ACTION - Just soak for 10 minutes and scrub away!
COMPACT LIGHTWEIGHT - Perfectly portable at just 40g!
DURABLE RUBBER MATERIAL - Built to last, ensuring you get the most out of every use!
EFFORTLESS RUST REMOVAL - Say goodbye to stubborn rust with minimal effort!
MEDIUM GRAIN FOR PRECISION - Achieve a smooth finish without damaging your knife!

The Kuniyoshi Chukyokenma Rust Eraser is a highly effective tool designed to effortlessly remove tough rust from knives. Measuring 1.5" x 2.5" x 0.5" and weighing only 40g, this medium grain rubber eraser is perfect for quick and precise rust removal. Simply soak it in cold water for 10 minutes, scrub the affected area, and rinse for a restored shine.

$29

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Manufacturer	CKK
Brand	Chukyokenma
Model number	#NA
Product Dimensions	3.81 x 6.35 x 1.27 cm; 40 g
Color	Gray
Shape	Rectangular
Material Type	Rubber
Manufacturer Part Number	#NA
Item Weight	40 g

KuniyoshiChukyokenma, M Rust Eraser, Sabitoru

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