[quote=mello mike]Here's a pic of a nasty crack on my fiberglass cap. The rivets have stopped the cracking from getting worse, but how would one go about repairing this? My father who does body work on cars suggested a fiberglass patch. Any thoughts on this technique or any others?QUOTE]
Mike, glassfiber repairs are quite straightforward, but a patch on the visible side would be obvious. A patch on the back would be elegant, but a lot of work. I would try to work out why the cracking occurred (unbalanced wheels?), and then cover the damage in some way. I can't tell from the photo how high the damage is, but how about a hardwood pad for a speaker or a light fitting, or a shelf? Only you would know! (Oh, and several thousand of us on the forum.)
Nick