My guess would be someone whose job involved waxing floors and hobby involved making models. Because, at the end of the day, the product is a sealer - it's job is to protect your pretty floor from the feet of people. An awful lot of "modeling" products are just day-to-day items, rebranded and marked up. (Don't get me wrong, there's also a lot of things intended for modelling that are better than the day to day item, but so many things are really no different.) Although in this specific case, I'm suspect the "use floor polish" tip goes back to at least the 1980s, so it's quite likely that there wasn't a hobby-specific product to use and folks were just experimenting, trying to find anything that would do the job.