At this point you may need to test the system to see if it works as there would be not way to know the impact that has been caused to the processor.
Furthermore, you should check with your Original Equipment Manufacturer on what do they recommend to keep the temperature values they established for this system without voiding the warranty.
Thanks for the reply. I fired up my machine and it is functioning normally. Temperature readings aren't much different from before the incident. Is it safe to say I'm in the clear?
One question, does the mirror surface of the CPU contain actual circuitry or is it merely a conductive layer for the heatsink?
It should be a conductive layer as the cores and circuitry in the processor are not externally exposed, so you should be good to go.
My recommendation is to check with your Original Equipment Manufacturer for their recommendations on maintaining this system and what can be used to keep temperature values under their specifications.