Looks to me like you are trying to patch the filler in just the low spots. That is a sure fire way of never getting a straight panel.
Your filler should extend into good straight metal.
Instead of applying a dab of filler here and there, coat the entire section or even the entire fender then block sand.

Last edited by sevt_chevelle; 11/04/2011 3:10 AM.

Currently working on custom metal and How to videos.

1949 and 1972 chevy trucks
70 chevelle SS455
Pictures of my work and projects
http://community.webshots.com/user/sevt_chevelle