The trick to using Never Dull & Permasharp is to put it on the chain, then let the treated chain sit for a while. The longer you let the chain sit the better the products work.
I tried never dull. Drank it. It improved my personality as a motivational speaker. Kept me from binding up with all that government cheese I was eating in my van down by the river.
Bought it, used it, loved it! I took its application to the logical extreme and soaked a worn out McCulloch chain in it. I think I see carbide nubbins popping out of the old, worn down teeth. Absolutely amazing. Never Dull never ceases to amaze me.
In regards to that bar, my wife says size does not matter, it's how you use it! Oh no, hold on, I didn't mean to say that. Did I just type that oh my god. We're all friends here right? Anyway, I'm trading my wadded sock, for a big wad of NEVERDULL!