body filler application

Scenario... deep scratch, maybe some depression. No real deformation of metal causing eyebrows. Scratch that sucker good in th deep part. 150 on the edges. Fill it up with some high quality filler. My cost is 100 bucks a gallon these days. Sand it with 150 while its still soft. Use a lot of paper cause it will plug.
It would be nice to see a picture of what you are dealing with.