Panel adheasive vs butt weld

[Hilandr451]

I saw this on another thread with regards to a big back window conversion on a 60-66 Chevy truck cab:

Originally Posted by 502tripower

It is not necessary to remove the roof panel. Just the back window liner is all that needs to be removed. I have not done it myself but, have friends that have used just the new panel adhesive used for new car construction to install the BBW liner and, it worked perfect. In both cases the trucks were already painted and they did not want to go through the repaint process. When they were done you could not tell and, in one case the truck was T-boned in a intersection and the panel was warped bad but the adhesive held with now separations.

How does that stuff do on exterior panels like say if a guy were to graph in a flush mounted fuel door to a bed side?