When carbon poles are made, you lay up the material, wrap them around a mandrel, wrap them in shrink tape then bake them. The pressure of the shrink tape is hugely important. Too loose and you get the prickly effect. This can happen because if the operative has a batch of slightly weaker tape which keeps breaking, he lessens the pressure of the taping machine, They then sand the pole for effect. We use a fabric which gives a shiny finish and does not need sanding and we do not need clamps . I think that for a "professional" finish, and for the clamps to be more effective, the poles are being sanded, which Is giving them a slightly duller finish but also opens the grain and is allowing the black stains to be released. I said before that if you seal them with a satin polyurethane it will should stop the stain release. We also found that the clamps were just as effective with a polyurethane finish.