My well worn guns still look good, also probably around 95% and this includes an AYA that I have shot for the last 30ish years.

I do look after them though, and as soon as anything requires attention it is done - no exceptions. As a result I have never, ever, had a gun fail on me, wherby it couldn't be used.

I do also have several guns though so the wear is also spread out amongst them - which is a good thing considering the amount of use they get. One of my guns a 13 year old FN Browning Superposed that I used for driven game shooting, that fired 35K shells still looked like new

Jonty