Cleaning/stripping used parts?

What is the best method you’ve found for cleaning old parts? I’ve heard mixed reports on what is best…and would be interested to hear your opinion. Also, what is the best way to remove caked on rust-inhibiting oil spray? I’ve got about a quarter inch of the shit underneath my car.

  1. Sandblast
  2. Chisel (verb)
  3. Clean tank with degreaser
  4. Terry Cloth with spray on degreaser
  5. Pay someone else to clean it

I don’t know about the rust coating.