I couldn't have said it better,,,
Soft linnings like suede just serve to accelerate this wear. What is happening is that primer residue and oil are transfered to the interior of the holster in effect making a lightly abrasive paste. Soft linings trap more of this residue and so wear finish sooner.
Also note that suede leather is chrome tanned,,,
There is always a bit of chromium salt left in the leather,,,
Chromium salt is corrosive so if your holster gets damp it
eats the finish.
The best lining is smooth leather,,,
I often make a holster out of two layers of thin leather,,,
I bond the flesh sides together to make one thickness of top grain on both sides.
Same end result as a heavy outer and thin inner layer.
According to every book on holster making,,,
A top grain leather lined holster will reduce blue wear.
Nothing will eliminate it.
Aarond