Bunka Zokin Ghost Killer 1L Size

I purchased this new last year to remove ghost stains, but I ended up removing them without using it, so it remains unopened.
At that time, I was fascinated by chemistry, believing that cleaning could be done by using various chemicals in sequence, and I cleaned obsessively.
Cleaning is fun.
I wanted to try Ghost Killer, but my current home doesn't have walls of colors that would show ghost stains.
Since I don't think I'll be using it in the future, I'm listing it for sale.

Below is the description from the retailer:

Capacity: 1L

This is a non-reactive water stain remover that does not use highly toxic substances.
■pH: Acidic
■Usage concentration: Neat to 2x dilution


Used for stubborn white water stains (ghost stains) adhering to the surfaces of resin and plastic.
Also effective on rust.


For bathroom cleaning, first remove soap scum with Bath Hunter, then remove efflorescence and scale with Macbee.
For any remaining stubborn white stains (ghost stains) in wet areas, after soaking for approximately 60-100 seconds,
scrub with a brush or soft sponge, and it will come off as if peeling off a layer.

For vertical surfaces that are difficult to soak, apply the detergent with a sponge, etc.,
and repeatedly apply to ensure the detergent stays in place and contacts the target stain.
With repeated sponge application, the stain will be removed within 60-100 seconds.
(Caution) If you use Ghost Killer directly, soap scum and scale (efflorescence) will interfere and prevent it from performing at its full potential.

After cleaning, rinse with a diluted alkaline detergent (Bath Hunter or Bath Light, etc.) to neutralize the wastewater.
Leaving detergent residue can cause discoloration.


■ Do not use for purposes other than those indicated.
■ Always wear rubber gloves when using.
■ Use in a well-ventilated area and wear a mask and protective goggles if necessary.
■ Do not mix with chlorine-based detergents as it can be dangerous.
■ Do not use on stone. Absolutely do not use on polished stone or marble.
■ Do not use on metals such as aluminum, stainless steel, and iron, or on mirrors, glass, and artificial marble.
(※ The speed of reaction (discoloration) varies depending on the type of metal and the surface treatment.)