Originally Posted by 72chevyelcamino
i have been using fiberglass on big rust areas after i cover area with sheet metal and pop rivets does metal under fibglass rust?
You cant use fiberglass to patch metal. I cant tell you how many cars ive restored that the fiberglass has de-laminated from the metal. There two different substrates that expand and contract at different rates also causing body filler to eventually crack.
My advise would be to have a competent metal man do the patch for you, Please dont destroy a car by using pop rivets. thats the kind of workmanship that everyone always shakes their head at and laughs. Its not a way to repair a car that you actually like.