[dsraven]

I suggest that you epoxy the bare metal before you do filler. that is because filler is usually porous and sometimes allows moisture to penetrate to the metal underneath. y=this causes rust and eventually the filler either falls off or the panel rusts out under the filler.do some direct to metal epoxy, apply the filler before the 24 hr cut off period to recoat the epoxy, so it sticks like a second coat of epoxy, then rough shape it or apply another coat as required, then coat it with high build primer, tghat acts like spray on filler, then wet block sand so the paper doesn't plug uo. you will be surprisd at how fast a 220 wet sand will tyake off high build. stop before you sand through to the metal. recoat with high build, repeat.