1: I need a more in depth explaination about spiral satining, and also what it will do.
2: Is silicone recessing a yoyo the best way to make it play unresponsive, will using a duct tape pad work as well?
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spiral satining is the pattern you end up with when you finish sanding the yoyo, satining is usually done to achieve a better gring surface.
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silicone recessing is a good option for making a yoyo unresponsive if you have the right tools for the job. I am not to sure about the duct tape pad idea, I would stick using silicone or a replacement response pad for the yoyo.