Yes I did use ''Gention Violet'' back in the mid sixties on the mouths of Pike. I was becoming a little concerned about mouth damage, after one or two examples of torn flesh on removing the trebles. Looking back that was a direct result of the trebles in use at the time, ''rank barbs''. It just didn't occur to us at the time to nip the barbs down, untill several years later.
Did it help, well I like to think it did. One thing's for sure, we were working in the right direction.