Hello
Hi mate
Paper would be better 40 24? I haven't actually sanded it and I'm sure it would make a right mess. I had my mates buffer that's got 4 carb blocks...
Copper disc would shred it. It's soft as ****
I put the stones over it before priming and sticking down engineered. My mate put na over one and it popped! He didn't prime it tho.