Johnny L.A., have you tried one of Sprayway’s products? I’ve been using a particular can from them for some 15 years, as have many of my friends once they found out about it. I’ve restored some black plastic trim back to original color, don’t recall it being completely grey, but it was bad. I have restored other colors back to original such as blue and grey that had went white on me.
Some years ago I had a 1984 Honda CRX that I was restoring, so went to a car interior specialist and told him I wanted to get this plastic panel replaced since it had went from blue to white over the years due to the sun bleaching it. He asked me why I wanted to purchase a new one as he reached for a can, and about the time I replied, “well, look at it,” he started spraying it with this clear liquid, and I think I just sat there staring at it, kind of stunned, because it went back to the original blue, it was like he had painted it with blue paint.
He couldn’t explain it, but showed me the can, and gave it to me to take home to use on the other panels. And probably a handful of cases (12 in these) later, I’m a true believer in this product. Ideally, you clean it first. Then use the purple can. I spray it on my tires, my windshield wipers, under the hood, mats, my leather interior, dash, any black moldings, lots of plastic stuff. I’ve used this on campers, atv’s, and people at the small airport across the street started using it on various parts of their planes. With few exceptions, most bleached plastic interior or exterior parts go back to the original color. Although the transformation is instant, I generally soak it overnight, let it absorb, then wipe what little is left with a rag. It’s silicone based, so a few materials you’re not supposed to use it on, for me, I use it on just about everything to preserve and keep things like new.
This is the exact purple and black can I use that is shown at Walmart: Finish Line Instant Shine by Sprayway #9936PDPG. It shows to be out of stock and is a bit high there. It’s extremely difficult to find this exact can, other than my local place. Hopefully, you can find it elsewhere. I’ve been fortunate enough to buy a case of 12, it comes out to $5.00 from a professional detail shop a mile from me.
Amazon uses a different can from same company shown here. So you can get a case for the same price I’m getting it locally, but these are 10 ounce cans compared to mine that is 11 ounce. Not sure what is in this can compared to mine, might be the same ingredients or slightly different. Maybe you can write the company direct, see if there is a difference, and perhaps they can get you a better price from somebody closer to you if you take an interest in it.