Sometimes you will not fix it until you cannot use it. So, what happened if it is beyond fixing? Recreate with it. And that is what designer, Mary Kaczor, a former F1 racer is doing with the parts salvaged from racing cars, mechanics have worked on.
Isn't it cool to be wearing the jewellery she has created with parts that come with a story on why they have been removed from a racing car? If you think that car parts jewellery will not look good enough to impress, then you must take a look at what she has created and is selling online at Renault for women.
Need an idea to start a business? Maybe you should start visiting the junk shops first.