I just received this response to an inquiry I posted to NOVUS Polishes:

Quote:
I would recommend the NOVUS #2 Polish in an inconspicuous area on the coated polycarbonate case. The NOVUS #3 can sometimes cut too deep into the polycarbonate surface and then #2 has a tough time trying to get the light scratches out that NOVUS #3 left behind. The NOVUS #2 usually polishes polycarbonates very well but if it is coated then it becomes more difficult.

I guess that's option #2, after Turtle Wax, if I can locate a bottle at reasonable cost.

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