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Okay, I got some sodium hydroxide, now does anyone have an idea on the concentration?

I use it @ 11%, but that's probably overkill. This will be good for the stuff that isn't beerstone, as per the last thread.

Thanks for the reply, so 11% eh? I was hoping for a mixing ratio, you know, so much per litre. Do you think you could help me out?

Definitely overkill at 11%. In breweries we use it at around 1 - 1.5 % on everything. And as Xman said, it's for organics not beer stone

Do you know the concentration of the stuff you have?

The package doesn't say the concentration, I used 1/2 a cup to 10 L and it peeled off the beer stone like magic!

That's the main thing. The gunk is gone and you didn't go blind. Can't ask for more than that.