Hi,

What is the best way to mark cut lines on pre-preg carbon fibre, to avoid making cuts on the mould.

Some guys at my place use white China markers but I find they aren't very precise, due to being fairly blunt.

Cheers
Steve

Most materials you can get a black or blue biro to show up fairly well
If you want to go the "crayon" route use verethin 
They are solid pigment not wax based like chinagraph. Gold (no99 I belive) shows up well,you can sharpen them like a normal pencil