100mm diameter

Standard recommendation for removing coatings:

CSS - stripping wheels.  Do what they say on the packet.  If working on a soft aluminium substrate be aware that the stripping wheels have the aggression to continue into the surface if too much pressure is applied.

CS combination wheel.  Ideal option if there is concern to not damage the surface of the parent metal

Back up:  TS wheel if it is a particularly delicate surface being cleaned

 
100mm diameter