I've used DecoColor pens (probably acrylic), the "fine" variety. They have decent color selection, plus gold, silver and I think maybe copper. They're fairly easy to use, can clean up mess-ups with isopropyl before they dry. The silver really does look silvery gray.
I've about had it with VBulletin. First they (for no apparent reason) took away the date of the first post, and for awhile whenever I login here, I can't post anything with Firefox. Have never had a Firefox problem on several other forums I frequent. This software is crap, and it's a disincentive to visit! No, I don't care to use Chrome or Safari!