Many thanks to Johan
one additional remark related to
There are a few parts in my current build where I didn't dare going any further, because the marking was do se so deep into the material that the parts would have become too thin, so some char is still visible, but will be painted later on.
According my personal experience it depends also how the designer and manufacturer designed the lasered parts.
When the designer took already the later char removal by the modeler into account or not
Here I try to show this in the oversized sketch
black lines are the wood, which was cut by a laser (red arrow) with brown is the char
Did the designer used, when he was transfering the measures from the 3D-model to the production design for the laser,
1) the center of the cut as the measure (blue), or
2) did he use the light blue line or
3) did he used the green measure after removing the char as the necessary correct size of the wooden part?
It is looking in the beginning very complicated, but after some work on a kit you can recognize it .....
In the beginning it makes sometimes sense to compare the parts with the drawings....
BTW: I remove as much as possible or all char from the parts
Using good needle files, sand paper, drum sander, etc. depending on the needs, sometimes the last touch I make often with a glass fibre eraser