I've mounted LED's directly to the shells of countless passenger cars, 50-60 of mine, and more of customers. Running them at reasonable intensity, I've never felt them even get warm, much less how enough to deform the shell! Unless you bought the high-power LED strips, I don't know how you get them hot enough to actually melt the plastic! Here's an 18" MTH Premier car light with 25ma total power to the LED strip. There is zero danger of anything melting here. How bright are those LEDs to melt the shell???
