This should not come as a surprise. RV builders are people just like everybody else. Some are good, some are bad, and some would do better to just.......
I long worked in a shop environment where applying proseal was an everyday routine fact of work life. In that environment, and exactly like RV builders working from home, some people had a natural talent to be neat and tidy working with proseal while others could smear and slop the stuff all over the place just by walking past an open tube of it. This is strictly an anecdotal observation on my part, but from what I routinely observed, women in the workplace generally tended to be far more neat when working with proseal than men. I always attributed that perception to the fact that women tended to show up for work in nicer clothes than men did and went to extraordinary lengths to keep em clean. It was in fact a seasoned female co-worker who showed me that methylene chloride could remove a proseal stain from her blouse with better results than Tricloroethane or MEK.