The coating did strip off the welded loop of one of my ( WF4F Rio ) lines after rather heavy, extended use with a thread furled leader. But it hasn't made any difference in the performance of the line and I see no reason to do anything about it.

Not sure if the Shorb loop of the thread furled leader had anything to do with the coating coming off the welded loop in the tip of the line, although I suspect that it does have a bit more "bite" than the butt loop on a mono or fluoro leader.

John