Did my fenders a couple of weeks ago with some great tips from Paisano and Rox-n-Mud, appreciate everyone's help.  
One of the best tools and tips was one from Rox-n-Mud.  He suggested I use a sheet rock rasp after making the initial cuts with a jigsaw to lightly take down any high spots.  Practiced on some of the cut off pieces to get a feel for how much pressure was needed.  I finished up with a 3m sanding block and some 200/400 grit sandpaper. 
No plans yet to add any door trim, like the look so far without it. 
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