I recently built an N model Jug as a work in progress thread here. The Gloss black primer is one option, but not absolutely necessary to get a nice realistic NMF. You will find that Alclad’s own Grey primer is great stuff too for this purpose. The thread includes a step-by-step tutorial in there for my method. If your so inclined, check out the link below and scroll down to the bottom of page 1. The final product can be seen later in the thread.
http://cs.finescale.com/fsm/modeling_subjects/f/2/t/151736.aspx
…and your gonna love that Tamiya Jug. In my opinion its the best plastic kit ever made.
Hope this helps,
Joe