Hmm there were some threads about that bubbling bit with mirrored acrylic. Let’s see if I can dig one up…
Looks like it was @auzamarie, who hasn’t been active in a bit. Maybe they’ll come back and comment if we tag this thread.
Here’s the discussion:
@lisa.07 also had a few issues:
Maybe they’ll have some insight. In both cases it looks like it was flashback. A picture of what you’re seeing might help here.
Lastly, @geekyteach has used iridescent acrylic in the past. Maybe not the same stuff but worth asking.