Small world
The paint was removed very slowly with various grades of wet and dry. 400 or so until i could see the primer coat, then down to 800 to remove the primer. Once the carbon was showing through the primer i went down another grade, but i dont recall what i had around. I must have removed a very small amount of the resin in places. But i never got down to the weave. Luckily they seem to have used quite a lot of resin, the weave is well hidden from the industrious sander.
That took a fair amount of time, then i went and rushed the spray job. Luckily the runs are not at all obvious to anyone but me.