[Arran]

 I could never figure out what the EPA had to do with Brasso changing their formula, what makes Brasso good for polishing plastic is the fine abrasives it has in it not the chemicals, and it's mostly the chemicals they are concerned with. I have a feeling that they changed the formula to cut corners on production costs and are invoking the EPA line as an excuse for making an inferior product, diatomaceous earth costs money and so does rottenstone. The mag rim and aluminum polishes always were and still are much more harsh chemically then Brasso ever was and they are still on the market.
In any event one the Novus line of polishes are supposed to be good as is Simichrome, the auto parts stores carry a lot of plastic polishes these days. If it's really bad you may have to wet sand the Bakelite to get rid of the roughness and scratches, but start off with 800 or 1000 grit and if that works then work your way up to the finer grits, if it does not then down to 600 grit or maybe 400 but no lower. In my experience it actually takes a lot to sand through the top layers by wet sanding with the finer grits, but it's usually not necessary to wet sand at all unless it's really scratched up.
Regards
Arran