I have already removed the grill from the body. The issue is that I have to replace 2 of the bars as they are dented and rusted beyond repair. The only rivets I've ever removed and replaced involved a chisel and a big hammer. Obviously this doesn't work on the grill. So after I drill the old rivets out...how do I get it back together when I get my repacement bars? I assume there is some sort of rivet tool available?