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The trouble with blunting a drill bit is that a small flexible drill bit may wander. For acrylics, a blunt/dull drill would generate a great deal more heat which will give a snot ball on the drill,...

Agree with the above. Do not use a colored buffing compound it can melt into the acrylic. Red rouge is especially notorious for this.Too high speed and or too much pressure will do you in. Softly...