Well, that's interesting, Bill! I'll have to try that, the logic is irrefutable.
As for model paint, it's probably illegal for anyone to purchase who's under 21, so parents would have to straw-purchase it for their kids, which is probably at least a class A misdemeanor most places, and a felony in California. Of course kids these days probably don't build model airplanes anymore, instead they watch utoob, play on the social networks, video games, and otherwise waste the peak learning years of their lives playing with gadgets.
I've been "carded" for buying masking tape at Home Depot. I'm 41. Go figure.