Hairlines on this 20 FRANC - serious or not

Hi guys!
I do not have much knowledge on gold coins, and the things that may be wrong with them - so I ask here.
Do you see any issues with this beatiful Napoleon Gold coin?

Hairlines, cleaning, anything? I mostly buy Roman coins, and seeing the flaws ofg Gold coins - well - I need help :)
Any thoughts?
The coin is beautiful in any circumstance - but getting it graded is my aim - and I know NGC are quite hard with their "Details" stamp....

Can you show us an edge view?
In the meantimes, yeah, those hairlines are probably a grade killer, sorry.
LRC

Forget just "hairlines;" I would say harshly cleaned.

Looks like adjustment marks on the reverse to me.
Quite frequent on French coins of that period.
The raw planchet are checked for their weight and if they are too heavy, they are being filed to match the correct weight.
These marks remain generally visible on the coin.
Although this should not have an impact on the grade, it has an impact on they eye appeal and the value.
Underweighted planchets were melted down.