Well in my experience 3 years ago, I traveled from Ontario, Canada to London, England. I brought over 4 1/25 scale built kits to enter in a IPMS Birmingham show. What I did was I took a show case turned upside down so the base is on top and put paper towel on the bottom and sides, place model in case and packed paper towel on top then put a good elastic. Then I put them in my carry on, pack clothing around the cases and handled it myself only no one else touched it. Made it safe and sound there and back and sitting in my show case at home to this very day. That how I would do it again.