Well - that's one done and a pretty good result I think. The bolts were never shiny, even from the factory but the coating of rust all over the heads is really unsightly, but I reckon about an hour dangling the hexagon heads only in the acid has returned them to what is probably their original factory look.
pictures
before
after
I need to look into something to "fix" the surface now to prevent future discolouring (if I keep repeating this I'm going to end up needing a smaller sized wheel brace) :biglaugh: :biglaugh: :biglaugh:
On going back to the car - to do some more bolts I spotted that the cleaned bolt has started rusting already - it can only be half an hour since I put it on - I will definitely wait until I can get some kind of rust preventer on them.
final picture