My first attempt to print with multicolor, and it turned out pretty amazing. I used the 'ninja drinkcoaster postitve fixed' version to do this.
white and silver metallic
I used Ultimaker white & silver metallic PLA to print this model. I used 0.2mm resolution and 10% infill. I used my 0.4mm nozzle. And heated bed was 210 degrees Celcius. I used a brim to avoid curling up at the bottom of the print. I paused the print after the solid layers were made a the base of the print and changed material. Then i resumed the print for printing the top layers. My advice is: check your top layer amount in your slicer and your able to see were a part of the print ends.