
Originally Posted by
machinegunsquid
The entire fender, or a part of the fender?
The entire fender, either remove it, or tape off the adjacent panels, and sand the whole panel with 400grit or so. Clean the panel very well, and allow to dry. Then apply the primer in light coats, allowing the proper amount of time between coats. After full coverage, wet-sand with 400grit. Then follow up with another wash and dry, then paint/clear.
If it's just a trouble spot (dent/scratch that's been repaired) then you need sand the area, and sand a few extra inches in every direct. When laying the primer, you need to feather it, so that the heaviest amount is in the center, and it gets lighter as you go out, to help blend into the surrounding area. Same deal with the paint/clear.