I wasn't try to say your way won't work.. I'm saying it isn't the best way to fix it... One of the worstest places to build up filler is on a roof or a hood.. You should know that... Them spots on that hood are pretty deep and slapping a bunch of filler to build it up isn't the way.. Sorry !!! And he isn't trying to ''skim coat that whole thing to make it straight with bodyfiller''
Skim coating and building something up is two different things... Why would anyone go through the time to fix it Knowing one day it could crack.. And they do.. You may have gotten away with it.. But it doen't say he will.. If it was just to get the low spot's out.. I would say go for it.. But that isn't what he's doing..Yet !!
I guess the Question he needs to answer for us is how thick will this end up..