Monster Zero x SciFi Japan - Archive Only

Ok, I have a question. I have a Rocket Pro Guiron figure...since I've had it it's had a dent in the side of its head. Its not too noticeable but its a nit pick for me as its one of my favorite figures in my collection.

Anyone know if/how I can fix this? I've tried blow drying it but eventually the dent returns....

If blow drying works to remove it temporarily, you had the right idea. Is the head a separate piece? If so, heat it up, pop the head off, and stuff something inside the head so that when it cools, the dent can't come back when it returns.