Now that right there is True Romance!B
Regarding original post - I don't quite understand. I once bought a pair of binos from a store, made by one of the "Big 3" (not Zeiss). When I looked through it at home, I noticed stuff in one barrel (black paint chips, I think). So I took it back to the store, smiled and explained the problem, and they immediately replaced it. With a smile and an apology.
On another occasion, I bought a pair of classic porros (the Austrian ones) from an online retailer in the UK. Similar problem - a chip or something inside a barrel. I emailed the retailer, they told me to send them back and sent me a new pair.
These problems are easy to resolve with a pleasant chat, phone call or email. Responsible vendors don't want the hassle of dissatisfied customers. And if you deal with the retailer (who is the first line of responsibility under EU law), you don't even have the hassle of returning the product to the manufacturer.