This stuff is safe on the plastic and only attacks the paint's ability to stick to the underlying layer. According to the modelers it can be used on clear plastic model car windshields with no damage to the clear plastic. So I guess it would be fine for gauges and other similar clear automotive plastics. Make sure you use rubber gloves when using this stuff as it will remove all the oils from your skin (or else your hands will wind up looking like Abe Simpson's).
Here is a photo after about three hours of soaking, once I got a bigger tub and fully submerged the grill. The paint just seems to break up and flake away with just a little persuading from a soft plastic bristle brush. (Do not use metal bristles as they will scratch the plastic!)
