This relates to a couple of questions. This is my method.
I used to teach young surgeons Advanced Trauma Life Support, and our standard saying was "this is not the only way, it may not be the most correct way, but it works"
This method is crititisized by those who preserve logos and stamping a at all costs. Personally I like a nice clean shiny pipe that I can enjoy smoking.
You will need:
0xyclean - the gizmo alongside is an ultrasonic bath. About $30 on Amazon.
Sandpaper. Several grades. I start with 220, 330, 400, 600.
magic eraser
Usually 600 paper scratches are buffable, but I also use micromesh pads.