take it to the car wash a use the power washer there and it will take them off real good and then use goo gone to get off the sticky stuff.
if there is any left.

 

I've never tried paint & decal remover myself but If I were going to use it I would try it on a ahidden area first to make sure it doesn't damage the plastic. I have used a cheap 1300 PSI pressure washer to remove the ones on my Warrior, it works very well with no damage to the plastic. On the later models you will need a drill to remove the rivets to get the warning labels off.

 

I think the acetone in nail polish remover will not only take the sticky stuff off but melt your plastic too! I used it on something before and it got on something plastic and melted it

 

I just took some decals off my plastic today with some zippo lighter fluid, worked REALLY good. Really easy.