What about this...
In structural analysis of parts, etc., the calculations do not take account about surface finishings... (at least, I think so... I have not so much experience in advanced structural analysis)... I do not know any equations or mathematical theory or tabulations about exact...
First at all, the above contributions covers all principal reasons for filleting, chamfering edges and finishing faces.
However, also I think that in a high finished surface will be more easy to find cracks with visual inspections, than in a rough face...
Also, it will take less primer (i.e...
