There is a poll and lively discussion going on over at Planet-9 about cars with blue paint on their engines:
Do you have a Blue Paint Engine? -
According to this poll, it looks like about 30% of the 987 engines out there have blue paint on them from the factory. There seems to be a correlation with known factory repaired motors, but nobody knows what it means for sure.
Any of them here in the 986 world?
Mine is a factory replacement engine from 2008, but no blue paint.