On 11/10/2017 11:02, Harry Bloomfield wrote:
Bill Wright used his keyboard to write :
I tried a grinder with a 1mm disk and it overheated the work. It might
be OK if you took it very steady though.

Just the surface friction from a fast moving disc, without doing any
cutting, will be enough to melt it.

The stuff forms a hard bead though which is difficult to get off.

Bill