[GMracer]

So in my project I'm working on my tubs currently. Welding and smoothing them out as best I can, now I'm new on the body work thing, but I'm curious how flat the welds have to be before using filler. Basically one side is flush and you can see a line on the other side, I don't want to risk welding it anymore since it's so thin. But will I have a issue spreading filler over a weld that isn't perfectly smooth? A friend said it had to be perfect or it'd create an air bubble.

By the way, this is going under line-x I just want it as smooth as possible before hand.