1 hr. trying out filling the rivet divots (say that ten times fast!) with body filler.... Didn't go well...  I made a jig to only apply the filler to the divots, but some still managed to get through and go on the skin.  Not good because it's hard to get off.

Then, after just a few rivets, the filler was too hard to use.  This isn't going to work.  Fail.

This was the jig I made to fill.  So beautiful, now it won't be used..