Tobbe A German saying is "Where is a will, there also is a way" After a thousand corrections by yourself after the person to be locked did try it on another thousand times you probably will succeed.
Yes, you will probably always have to deal with a bit of rust on the welded parts - if you don't use a rust safer... there are some liquids you can put on the mathat to prevent it from rusting. And there also are the rust preventing paints
Alright, if they can afford having it done it's great. But still, there are a lot of people living in the slums though. And especially there anyone should wear a belt.