Ive never worked on classics before. So i dont know the way you all do it. Ive seen some guys(shops) bondo the whole car and sand it all down, gets ALL low spots. Ive also seen some guys(shops) just bondo the spots they can see by eye. So i wasnt sure, thats why i asked. As for bondo. 1/2 thick is WAY TO THICK. I only use a 1/4 if i REALLY need to. Thx for the help guys.