Remove the fender.
Rough up the back side edges of the hole with a metal file.
Take a strip of metal tape on the outside (painted side) covering the entire hole tight and smooth.
Now get yourself a stick of VersaChem Magnum - Steel Epoxy Stick
Break off a chunk and knead it together...you will feel it start to warm in your hands.
Now from the backside of the fender...fill the hole while spreading the excess from the center out over the edges of the hole from the backside.
Let it sit for about 20 minutes and then remove the metal tape from the front.
Light sanding from the front and the hole is filled with very little effort and it will last with no issues...done to several Fieros.
[This message has been edited by TXOPIE (edited 05-11-2015).]