I've kind of gone the opposite way to that, i.e used Boretech religiously and have now gone to KG's.
I had a badly neglected barrel and no amount of Boretech would remove the fouling. I looked down the barrel I could still see colour (copper fouling) after hours of cleaning. So I purchased some KG's after reading that article in NZ Hunter mag and to be honest my first impressions of KG's were that it was useless, as the patches came out clean looking - so I assumed that nothing was happening. But after following the instructions on the bottle (KG's) I shown my torch down the first couple inches of barrel and all the copper streaks were gone as if by magic!
Weird stuff (KG's) but it certainly works much better than the Boretech does for removing copper IMO.
kj
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