With very little experience of these things I designed a Raygun Graphic. To be honest my only real exposure to these things is this very Raygun forum, so apologies for inaccuracies in concept, era etc. I just wanted a fun, cartoony looking Raygun.
I have also done a R35(repro), an Atomic Robot Man and one with all three robots on.. I am going to try to sell some on Redbubble and also try to sell a few designs to some online t-shirt places. Saying that Threadless have rejected a few designs this week, so not sure how much success I will have. I have just sent a Raygun design to Spunky to see if they are interested.
Have you ever thought of setting up an e-shop for prints of your work Gib? Redbubble go greetings cards, posters, all sorts of stuff.
Thought I would get an opinion on my Lilliput design. In the end I decided the best way to go was with a camera. So I took a photo, cropped it out, played with the levels and added a stroke around it. I think it actually works better than just a straight design. And it was much, much quicker!