Now a slightly more on-topic comment about the BA tailfins (sorry niknak !) is that when they first came out I'm sure they were described as not being paint at all but done with preprinted adhesive vinyls. Among the benefits described was the ease of changing them compared to paint.
However after the livery's acrimonious demise they seem to have been left around for years, only disappearing on a major check, strip and repaint. There are still several about. So what was the story ? Were they harder to change than described ? Did some people still have a soft spot for them ? Of course the current BA livery is not a different one, just one of the tailfin designs universally applied.