In 2002 or their about, aluminum adhesive used in the repair of BMW aluminum bodied cars was used to repair my rear shroud after it was destroyed from lights down in a collision. New lower panels were acquired from Healey Surgeons and it was thought the adhesive would be much better then welding old aluminum to new. Although I believe the adhesive is still in tact and performing well, a fine crack in the paint has formed across both joints and the owner of a body shop suggested it was the result of the body filler failing across the joint. Although these paint cracks are not at all obvious to anyone other then myself and easily eliminated with a small repaint and it is too small an issue to extend any effort.
Since my use was more then 10 years ago and the cracked paint appeared maybe 5 years later, I am not sure how valid it would be as a reflection of todays adhesives and fillers. However, I would approve the use of adhesives today but more questioning on its application related to how potential joint flex would be handled by the paint and filler to be used.
Ray(64BJ8P1)