https://www.youtube.com/watch?v=R-vL24bhq_M
https://www.youtube.com/results?sear...+with+heat+gun
Remember however, once you sand, you will remove that natural texture. It will be a smooth surface surrounded by textured. (the parts you didn't sand)
There are many methods, but all are very harsh. WD40 melts plastic.
Heat gun method may work but be CAREFUL you may burn or warp.
Check out you-tube for yourself for other procedures.