>>133441487Practice molding plastics.
Start with cheap sheets of plastic, make a ghetto plastic vacuum frame, and also have a woodshop vacuum
http://www.youtube.com/watch?v=eUB58z8apTEExperiments with different models that you'd use to mold the plastic over. Also, know that it has the potential to peel off any paint off what the model may be, so try and not use something like a bike helmet, if you consider making something like that
This is coming from someone who has a VERY ROUGH knowledge, and has no experience. Just what I've researched.
Also, see this
http://volpinprops.blogspot.com/Also, see /cgl/ and /diy/ for assistance. Mabye /fa/, I'm uncertain