Just wondering if anyone has had an issue with heat from LEDs used in figures. I can't imagine that a small one would get warm enough to warp the plastic, but thought I'd ask.
The closest thing I've come to something like this is my display where I have Christmas lights mixed in with TFs. The metallic paint on my BM Jetstorm's chest melted off because it was near a light for a period of time (few hours).
i shouldn't imagine a normal 30-60mw LED run for a few hours at a time would get warm enough to warp the normal outer shell plastic TFs are made of, but if you have any concerns just mount the LED on something rather than glue it directly to the shell-wall. a little bit of clearance would probably do the trick. make sure you're running it near the smallest amount of current needed to light the LED, with excess current you're creating additional heat rather than light.