I clearly understand Chevron steps 1 and 2. Chevron step 0 seems simple enough: if the interpretation was made using formal adjudication, notice and comment rulemaking, or "sometimes in less formal procedures", the courts should apply Chevron steps 1 and 2. It is my understanding "sometimes in less formal procedures" means the court must then determine whether or not this informal action should be afforded any deference at all. Does the court use the factors in Skidmore to figure this out (thoroughness of consideration, validity of reasoning, consistency over time, “and all those factors which give it power to persuade, if lacking power to control.”)? If I am correct, one would then analyze the informal action with these four factors in mind. If these four factors lead to the conclusion that an agency action should be given "some deference" under Skidmore, does that mean it should then proceed to Chevron to see if it is a permissible interpretation or is it a different form of deference altogether (if there is a different form of deference altogether, what does "some deference" really mean)? What happens if the informal action doesn't meet the requirements for "some deference" under Skidmore after an analysis of the aforementioned four elements? I know that the remedy for an impermissible interpretation according to Chevron step 2 is remand so that the agency can rework the rule, but what does the court do if it finds that a particular agency action should be afforded no deference at all?
I'm going to take a look at Werhan's Principles of Administrative Law tomorrow, but any insight on other helpful texts or just general help would be great

So sorry if this is unclear. I understand each of these things on their own, but putting them all together is really giving me problems.