What is 「ケステンGチンキ」 a reference to?


This word/set of words/whatever it is popped up in something I am reading, and
I cannot find any clue as to what it is referencing. The book is a taiko
performer's biography, and this is the very last sentence of the introduction,
where he is reminiscing about Sado Island and his deep connection to it.

The sentence in question:

> 真野湾沖に三二の漁火を数えた夜、ケステンGチンキをぬりながら・・・佐渡で

I know the beginning is something along the lines of "The night that I counted
32 fish-luring flames out on Mano Bay," and I assume 「ぬりながら」is "while
painting...", but even if I assumed 「ケステンGチンキ」were the name of some kind of
paint, or a reference to coloring on the water, I don't really understand what
this phrase is trying to convey.

Here's the rest of the paragraph for context:

> この本は、一九八四年一月から月刊「鼓童」に不定期連載されはじめ八五年七月
> で一二回（一打）になったー表題の『万里の未知も一打から』と、八二年・三年季刊「鼓童」に載った太鼓の話三編をまとめたものです。ウンコがながめた金魚のお話、最後のページまでお付き合い願えれば幸いです。真野湾沖に三二の漁火を数えた夜、ケステンGチンキをぬりながら・・・佐渡で

Thank you for your help!




I googled 「ケステン チンキ」 and found this:

> 浅在性白癬に対するKestenチンキの治験

[https://mol.medicalonline.jp/archive/search?jo=ai6yrtyb&ye=1978&vo=6&issue=6](https://mol.medicalonline.jp/archive/search?jo=ai6yrtyb&ye=1978&vo=6&issue=6)

Maybe 「ケステンGチンキ」 is a kind of antifungal medications: cream for tinea.




I googled 「ケステン チンキ」 and found this:

> 浅在性白癬に対するKestenチンキの治験

[https://mol.medicalonline.jp/archive/search?jo=ai6yrtyb&ye=1978&vo=6&issue=6](https://mol.medicalonline.jp/archive/search?jo=ai6yrtyb&ye=1978&vo=6&issue=6)

Maybe 「ケステンGチンキ」 is a kind of antifungal medications: cream for tinea.

