So I picked up a pair of Ducati monster dogs from eBay and admittedly I wasn't expecting too much. They were cheap and they were quite dull and weathered looking. I then remembered I picked up a bottle of Meguiars plastx polish after reading about how great of a job it does on frames. I'm always skeptical of instant fix polishes due to my years in the collision repair business and I know how difficult a proper shine is to achieve. But let me say I was truly impressed. A couple minutes worth of work yielded very good results and even cleaned the grime off of the lenses as well. Anyone wanting to bring back an old pair of lenses should definitely give it a try.