Would anyone know of a good plastic adhesive that will NOT discolor or blemish the plastic lens covers on the dash. I need to install an extra gauge on my SRX dash and have been warned that the vapors from some adhesives can degrade the plastic face of the gauges. Looked at some glues/adhesives in the hardware section today but most have disclaimers regarding plastics (poly this and that). Anyone with experience on this topic? Any and help greatly appreciated as I definitely DON'T want to make a mistake here!