But is 1/4 ounce enough to show the effect? I would have used at least 8 ounces. Quantity matters! Also there was the slight possibility that the keratin nail

But is 1/4 ounce enough to show the effect? I would have used at least 8 ounces. Quantity matters! Also there was the slight possibility that the keratin nail provided buffering that prevents the steel nail from dissolving. It would have been prudent to test them separately.