nut or bolt

Going to throw two questions in here to save threads, they kind of tie in with one another Recently noticed I had no bolt covers on my alloys, can't say if I had when I bought the car but now it's bugging me, as my bolts are looking horrid with rust. If anyone has changed them, or replaced...

While searching on ebay for some new wheels for my C class I came across these chrome wheel nut/bolt covers. Could be useful considering the number of threads about rusty wheel bolts. I would get some myself but haven't decided on the style of wheel to get...