Right, Paint is a lot more sensitive to it than unpainted plastic and is usually the first thing to be damaged. So storing the effect parts with the battle masters short-term should be alright since they are mostly unpainted. Like I said, this was a HUGE problem in the GI Joe collecting community about 10 years ago. People would store away their figures and accessories in plastic sandwich bags, then put those bags in plastic totes, then would crack it open after a couple of years to discover that all of the paint used on the figure had turned sticky and would wipe off easily. As far as it damaging unpainted plastic, that really depends on the chemistry of the plastic used on that particular batch of figures. That's why some bludgeons and Scavengers are stable while others are really melting badly. To kinda add on to my hypothesis about heat being a contributing factor, it's my understanding that it only worsens the effect in a enclosed area where the off-gassing cant disperse, but it will still damage plastic it is in contact with regardless. Basically think of this in the same vein as someone polishing a ABS 3D print with Acetone. Acetone will obviously smooth the plastic if directly brushed on to the part, however, it will also slowly polish the plastic if you soak paper towels with acetone, line a container with it, and then seal a 3d print in with it. Now do that, but instead seal the part and paper towels in a heated container such as a crock pot and you see the effect happen much faster and to a much higher degree because the heat causes the acetone to vaporize at a much faster rate, thus causing the vapor to be much more dense as it is evaporating much faster than it can disperse out of the container. Something I kinda am curious about is what changed during ROTF. Because Hasbro has used rubbery plastics for nosecones and other sharp points for almost as long as the brand has been around. You would have thought someone would have noticed seekers melting or something by now. Whatever they changed, however, has persisted as people have started seeing issues with combiner wars megatron and obviously with the effect parts now.