I have come to the point of rarely being surprised at how some men do not know how to dress nor how to find out for themselves. Web boards are rarely much use as no one knows you, your colouring, your employer etc.
There is also an all too rarely used feature to 'Search'. That has the answers to a diatribe like this one.
So you answers in order:
Depends how much you wear them and on what surfaces
Universally dreadful, search and you will find out for...