I have 2 steel parts which were both powder coated in a polyester powder coat, however one of them does not perform exactly as I would expect it in my unusual use case which depends on temperature. I suspect this is because the well-performing one contains epoxy - but I am not sure. I would like to sort of narrow down my options for ordering new parts.
Both parts look virtually identical, and unfortunately I only have 1 of the well performing part, which I also need to use constantly.
Is there a reasonably accessible (common household/industrial chemicals or tools) way to detect if either of the powder coats contains epoxy, without it being triggered by polyester, either chemical or otherwise?
From what I gathered, acetone would dissolve both of them, so that likely won't yield any results without some detailed analysis.