how to strip the grille??

Easy off oven cleaner strip's paint and doesn't harm plastic. Used also for stripping paint from old model kit cars you want to redo. I use to fill a pan with it and set the model in it for days and it didn't harm the plastic. You will have to spray it on let it sit and rince. May take a couple of recoats depending how thick it is. Works for any plastic or vinyl seats and dash pads.