you can do what I did and polish them by hand up to 2000 and they will look like a mirror...
Only problem you have is you won't be able to seal them with lacquer as it won't stick
What I've done with my Monza reps is to sand them back to get them looking good again but then gone to 500 so lacquer will stick
The diamond cutting leaves like a ribbed effect which is why they lacquer sticks... I've sanded all of this away too

