I thought "Why not?! It probably won't be a disaster!"
Before:
I used #0000 steel wool and acetone on the right. The steel wool left it pretty rough and I ran out of acetone.
I wonder and how clean I could have gotten it with an entire bottle. Each time I wiped it the shop towel came away yellow.
I used PlastX on the right. I was going to wet-sand and then use PlastX on the left, but it wasn't bad enough to need sanding, so I removed the tape - - and used whitening toothpaste from Dollar Tree on the whole thing.
Mom and I agreed that the toothpaste worked better than PlastX.
I flung toothpaste all over the car, myself, and my clothing!
It bleached my clothes!
So, use toothpaste lightly.