Moving out of an appartment

As said many times, wear and tear is an unknown concept in Belgium. Here it is simply called "damages" and as such are billed to the tenants.
Paints are considered beeing amortized at the end of a standard Belgian contract: which means after 9 years.

And you are required to give back the rented place in, at least, the same conditions it has before you moved.

Just read again your Etat des Lieux d'Entrée...

The smallest difference between this report and the actual conditions will be billed to you.

Not only the costs a professional will bill your landlord to restore it to its intial conditions but also the time needed, during which the landlord can not rent out his property...