Buying used car: Engine has paint around oil cap/dipstick?

Looked at a 2011 Honda Accord Euro today from a dealer, not many Kms, only 60,000. Everything seems in good condition. But on inspecting the engine, I noticed there had been pink paint applied around the oil cap and oil dip-stick. I asked the dealer why it was there and he seemed baffled, he said maybe the previous owner had applied it to clearly show his girlfriend where the oil went Pfft.
Everything else with the car seems fine, took it for a decent 10min test drive and didn't notice anything. Have no clue why someone would spray paint those areas.
If you look in the photos of the engine bay you can see paint on the cap.
https://www.carsales.com.au/dealer/details/Honda-Accord-Euro-2011/OAG-AD-14396497/?Cr=0

The advice I give for those in the US is: when wanting to purchase a vehicle always pay for a mechanic to do a complete inspection B4 purchase… Not sure if that's possible in AU

No

My van has yellow paint in those areas. The manufacturer did it so nobody puts oil or water in the wrong place. I do not know about pink though.

Yes he is right, if its pink its for the oil