you keep on soaking your 3D parts in isopropyl alcohol and leave them in their to long it will melt them. i use it also to clean 3D parts but i will not leave them in over 3 minuets at a time. i was talking to a guy one day about soaking in alcohol and he left a body in over night next morning all he had was a melted body..lol..one thing i have found out if you spray on a new paint job and you mess it up ( enamel or acrylic paint) you can soak it in 91% isopropyl alcohol starting out at 5 minuets as soon as the you finish spraying the paint. then with a old tooth brush under warn to hot water start removing what paint you can. shake the water off and keep re peteing till all the paint is removed. wash well..within 30 minuets or less you will be ready to prime again ( could take longer on some models)..
ok since you stopping and sightseeing get you some Dry Ice Pack. lay a heavy towel in the bottom of what ever you gonna transport them in, then the ice packs then another heavy towel then pack your models. Amazon sells them.