Rust on six-year-old XP9!!

Hello, it was time again for an annual inspection! When the master took the car, I noticed that in the area above the rear axle, where there are hardly any stones and splashing water, it gammelts merrily at the metal edges and welding points. I drew the Master’s attention to this and he only meant that this does not fall under the rust guarantee, because it rusts from the outside to the inside. Here is the classic case, that the pea counters at Toyota saw a possibility, many things I had to make an underfloor conservation now, which costs me 200 EUR and should be repeated every 2 years!! This is really a pity now, because I was very satisfied with the car so far. However, the Toyota brand is now linked to the topic of rust. Therefore, I can now also give a guarantee to Toyota: That was my last Toyota!! Greeting to everyone and watch out if you have any Want to buy used!! Ernstjulius