Cluster Housing Refurb

Functioning aside, I'm going after decent looks as well. My small gauge lenses are stained with rust as you can see below. I fixed the metal parts that created the rust and they turned out pretty good. 01e85ef3fab6bbabedc65b0589138b7da9e6947dd1.jpg 0155b8438b41dfa9cc6acf94193a4407b06f73723d.jpg Anyone have any ideas on how to remove rust embedded into plastic? I tried vinegar and baking soda as well as toothpaste. It worked a little but didn't touch the deeper stains.IMG_0704.jpg