Agree with poster above. Having a 10 year disclaimer has stopped a lot of claimed for older body parts.
I tell customers, i just can't guarantee the quality of automobile accessories/trim after that amount of time. Even if garaged, these parts get hot/cold thousands of times in 10 years.
Sometimes those parts are very cheap and I can just fix them myself, depends on the customer and hot they treat me. If they're very nice and a good customer, I'll buy them a $25 mirror and install it rather than lose their wash club business.