0METALBLADE 9 years ago ReplyUpvoteI would use Fiber-Hair or Bondo-Hair. You can get them in an auto supply store. You just mix it with the hardener, smear it on and around the joint and it sets quickly. You might have to do a little sanding first that would be a quick way to fix it, they use it for rust-outs in car bodies and taxidermies use it as an all-purpose adhesive and filler. Hope this helps!