Card carrying scientist anon here.
Uranium exists in nature, namely a key ingredient in YELLOW pigments, and fluorescent paints, etc. Of course there is a measure of radioactivity, but this isn't the bullshit the want you to wring hands over.
Remember, bananas are radioactive as well.
They literally have a guy with pigment supplies commonly obtained both commercially and and otc at any hobby or paint store.
But pigment doesn't make the news, does it?
Common sense should apply as well.
Dude is a common rural 'Ernest T. Bass', not agent of Cobra Commander.