Tamiya paint reacts with styrofoam in my travel case

If it's the same kind of foam I am thinking of, then it has to do with the foam formualtion itself.  I have a green-grey pick apart foam leftover from a case that I use when gluing things and I have noticed that it is highly reactive.  There is a lot more crazing on the Styrene bases I use than when I just stand them up to dry. 

 I have also noticed it to be very reactive to organics.  If I get the glue too close when drying, the foam turns a biright green color and crumbles to dust.

 If you are using the same stuff, I would say your best bet would be to just head to the local fabric store and look in the back in the section for re-upholstoring chairs.  They generally sell foam cheap and in large quantities.

thanks for the replies. The same post on the auto side of the forums suggests using flannel as a packing material, which sounds good to me.

The conditions are normally closed-top box (one of those plastic stacking storage jobs) and temps here are average 70-80 in the room it is in. Humidity is defintely a factor when the cases are opened and exposed to ambient air but ive not had any kind of humidty buildup inside the cases.

 I agree withthe plasticizer, souunds like this component in the foam is reacting with the acrylics.

thanks again, got some adapting to do to the box.

David

try placing 100% cotton tissue paper, (basic kleenex) perhaps between the foam and the model, any tissue residue will blow off easily. Its also cheap. Maybe it will work. I's be interested to know how long the foam was in contact with the model and under what conditions? Hot trunk...humid ???etc???

I just hate moving models!