I can always tell when a new term has started from the amount of mail I get from students who have decided to study my work (I never fail to be astounded by that). If you are one of those students, I am very sorry but I just do not have the time to answer all of your questions. But, just for you, here's a little post that may make your research a little easier.
Here are a couple of previous posts on how I might go about creating one of my drawings, in this case a shoe; How to draw the Adidas Gazelle (as seen above) HERE
How to draw a Converse boot HERE.
Here's a few interviews too. One for the excellent Empty Kingdom, Funky 44 and you can find a three-parter by searching the charming Make Do and Mend.
If that's not enough you could always purchase my zines. They contain a whole load of info (how I create the stuff I do, pen reviews, etc, etc). I hope that helps. Plus, of course, this is a whole blog that'll tell you everything you need to know (and everything that I want people to know). Go, do your research! You can also follow me on Twitter, for all updates of new drawings and blog posts, HERE. Cheers, my dears.