Have you checked out Testors Scale Workshop on You Tube?
http://www.youtube.com/results?search_query=testors+scale+workshop&aq=0&oq=testors+scale+w
There is also Video Workbench, a series that first appeared on VHS tapes a while back. I have the sci-fi modeling VHS tape that's at least 10 years old. They are now sold on DVD.
http://www.videoworkbench.com/
There was also an old PBS TV series sponsored by Testors called Adventures in Scale Modeling. It came out nearly 20 years ago and was on VHS as well (I have 3 tapes, each includes 4 half hour shows). I Googled it and found the episodes on You Tube as well.