if just morning .. its seem ok .. because it can be water vapour nia... a good combustion for every 100ml produce about 1L of water .... and especially in morning, the condensation make it more visible....
since now after overhaul... use a tissue to clean the exhaust tip real good, then let the car start and pedal hard few time.. then let it run for a while.. .
maybe 3-5 min, wipe again..... see any obvious oil stain is there or water stain...