bondo is for fixing dents and small holes, if you try to fill the left stick hole and face buttons with bondo you are asking for trouble. bondo makes a product called bondo glass that would be better than reg bondo. but a fiber glass mat and resin would be best. then bondo tho top it off and smooth it out. if you use bondo it wont last long. I am going to drop it the first time I play with it and there goes the bondo.