When it comes to microfiber towels I always recommend using what you like. Thin or thick, short nap or long, it really does not matter and as long as you are using what you like you should see some great results. With that said, when removing excess coating residue towels can tend to bunch up due to the residue being so tight to the surface. A GSM around 300 is great and I personally recommend something like the Rag Company Pearl Coating Towel or Rag Company Edgeless 300 Microfiber Towel.