Roger, IMO 1/16 would be too tight and will result in paint chips as the body/doors/trunk lid flexes and moves around during road travel. On a positive note, at least they give you plenty of material to get the gaps set as you like...

Ryan, that will likely get done as well, but will wait until the front end comes apart again.. Re: the welding rod tacked on, I think you were likely looking at a TIG welding rod, which is copper coated steel. I haven't run into the need to fill a gap (yet) on steel, seems all of mine have been the other way around.