I used Epoxy on the Quarters. I bought the 45 minute cure. It gave me time to "Adjust" as I was setting. I Welded the roof to the quarter after if gassed off 2 days later.
It was suggested to me to weld the corners after the epoxy set.
I fitted the rear lower valence and all seems good.
As always there is a little "Adjusting" to do.
I am happy with my results so far.
Hanging a quarter panel, aligning it, making sure everything is just right before the adhesive cures makes me wonder what the procedure is.
You've got 45 minutes to work with before the adhesive sets up.
Can you tell us more on how you do this within that time frame?