I have shipped quite a few built models with no or very little damage. Normally I wrap the hood ( if removable ) in bubble wrap and I wrap the model in bubble wrap also. If it fits into the model box I pack it in there. Then I use one of the post office priority boxes called the "shoe box" and use bubble wrap around the kit box and packing peanuts on both ends of the 'shoe box". I won't say it's the best way but it works for me. Only damage I have had is with mirrors coming off or an antenna.