Pentrol does work well as a restorative but it’s not a permanent solution and you’ll need to make sure it applied evenly and buffed to avoid blotches and streaks. I’ve used it in my fender flares and also my bumpers and it has an appearance similar to a protectant, like 303. The problem is that water pressure from the car wash can remove it in areas so it won’t remain even.
You can use it but plan to reapply every year or two. I just buy 303 by the gallon now. It looks great and also provides uv protection.