Strut bolt works, just make sure where any part of the bolt seats, that there's metal to metal contact. As mentioned, remove the paint there. Use a dialectric grease too on the surface, between bolt and washer, stud, whatever on that point that you ground. If no grease is available, simple petroleum jelly is ok as it will keep out moisture. This and you're good to go!
: )
I use dialectric grease on all my grounds and electrical connections under hood, at battery and alt too. Reduces chances for crap faulty grounds. ; )
