Can someone please tell me what the thickness of the paint should be on the new honda civic 07 plate ,in microns

Here's a link to common tools and measurements. If you're having an issue, say for example with an auto body shop or what an insurance company is willing to pay for this might be useful... ":
Automotive Paint Inspection with PosiTest DFT Paint Meter
Notice it's not in micron's but in mill's of thickness...

If I remember correctly, 30 years ago the standard OEM finish for domestics was 1 mil primer and 2 mils top coat. A mil is 25.4 microns. The thicker the paint, the worse it chips.