Painted red plastic bracelet, testing, age, painting

I just got this painted bangle from a local thrift store, and I find it looks very similar to some painted bakelite bangles I saw online. But of course its possible that its not.
I heard it was sometimes difficult to test red bakelite. How do you suggest I test this bangle, Im a bit scared that the hot water might further damage the painting on it.
Another question is, what is the best way to clean it if I don't want to remove all the painting left on it? (I already cleaned it inside, you can see its a much nicer red.) And a last question: How old usually are these painted bangles? (if they are bakelite) Is there a way to repaint them? Haha, I ended up with lots and lots of questions.
Thank you so much to anyone who leaves a reply!

Vic

 

Anyone with some ideas?

 

Might be late 1960s. Plastic bangles with folk art motifs were popular then.

Debora

 

Thank you! You are so knowledgeable!