I've used it to touch up plastic plated items like a vintage Battlestar Gallactica Cylon figure. Works amazingly well. Just don't touch it for a week or so.
I use them for everything from weathering to touch ups. They’re great, but as stated above, let it dry and cure fully before handling. You’ll dull it if you don’t.
Yep I have used them on scale rc truck hardbody bumpers and trim. Stuff is incredible but I read somewhere here DONT clear/gloss coat the stuff! Just let it cure as stated above. Also it doesnt hold up to scratches well so handle gently on a prop.