there are a few spots where sheetmetal was riveted on top of the exsisting sheet metal and the entire area was bondoed up to make it blend in. how should i fix this. should i leave the riveted metal there and redo the filler. also this seems to be the cas for dents as well. a huge area was bondoed up to cover a few dents. it was up to 1/2 inch, maybe more. i was under the asumption that the least amount of filler used is best. im about to go start filling in the minor dings and what not, just taking a little breather. its my day off and all i do is work on my car!!! oh well.