Easiest cheapest way to fix dent

Cheap.......180 grit sandpaper sand the dent and around the area maybe 1/2" or so...throw the bondo on....and hope it doesn't pop off in about 6 months time, or when the hood gets slammed shut.
Cheap+.....180 grit sandpaper sand the dent and around the area maybe 1/2" or so, tiger hair bondo sand smooth then your clay type bondo repeat until your happy...…;>}
Fast Good Cheap