Reminds me of the nuclear boy scout who tried to build a breeder reactor in a shed from materials in smoke detectors.
I believe you are thinking of Uranium (depleted) which was once a common pigment in paint and ceramics.
Plutonium has never been used in any commercial product that I know of. I can’t imagine it ever being used in commercial products simply because it does not exist in nature and it is very expensive to produce.
Thorium also was used in ceramics and is no longer permitted to be used in most products. Still in lantern mantles I believe.