I've cut rubber stamps before with the Speedball pink blanks. I got the best results by scoring the surface first with an outline (0.2mm with a 30deg engraving bit, 12000 rpm, 200mm/min). Making 2 passes at full depth (1.5mm) and full speed 1000 mm/min with 2 flute upcut made it look pretty good. The little that was left to clean scrubbed off lightly with a white scotchbrite pad.
Thank you for taking the time to show us a comparison of the results using different bits, passes and depths really helps to understand how to adjust for every project.
