Not something I would do but heres one that came in the shop for other work........
A section of copper pipe was used with JB Weld. Owner knew nothing about it, but it had recent body work and likely done there. He declined replacement of the hardline, as other issues were "more critical".
Nothing more critical than an oil line in my opinion, but it has been that way for a few months so the owner will "keep an eye on it".
Len