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Old 07-09-2008, 06:02 PM
Brian Martin,Freelance adviser
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The "ghost line" is caused by the expansion and retraction rate being different between the metal and the glue.

However, I will post later (if I can find it) a bulletin from GM on bonding a roof splice on a Blazer that shows how you can reduce the ghost line by grinding the metal thin just as you would with fiberglass.

Depending on the location and the color of the car, this ghost line can be horrible, or hardly noticable.

If you want to read a little on just how strong these modern adhesives check this out....My sons science here.


Last edited by MARTINSR; 07-09-2008 at 06:09 PM.
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