Actually, it's not duct tape, I use electrical tape to tape the spine when I hone because it's more resistant to water and slurry, so I don't have to swap it often.
But, there's a downturn, by having very strong glue, when I remove it, the spine catches its goo and I find it hard to remove it.
Can I use some kind of chemical stuff like acetone or something without ruining the blade? Even alcohol doesn't remove the goo completely!