Check what your plastics made out of. Polyvinyl chloride under laser turns into chlorine gas. Not real good for you or the machine.

From what I've gathered, cutting Coroplast on a laser can be a bit tricky with settings—you want to get that balance just right to avoid melting or uneven cuts. I've seen some mixed feedback online about its feasibility, so it might take a bit of experimenting.

If you're still on the hunt for the best approach, I'd suggest reaching out to a ptfe sheet supplier. They're not just about sheets—they often have expertise in materials that work well with lasers and could point you toward something that fits your setup perfectly.