Suggestions needed: engraving two color acrylic

Hey gang. You’ve all been so helpful to me in the past. I want to try engraving some faceplates, logos, etc. For the amps and pedals I make. I currently have them laser engraved, and while they look great, it’s very expensive.

Below is a picture of another pedal maker’s engraved pedal plates, using rotary engravable plastic.

Can I please get some suggestions on what bit, and what feeds and speeds I should try? The amount of trial and error to get something right on the Xcarve can be really frustrating to me.

Below is an example of what my logo and faceplates look like.

Thanks for the help!